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21254405214 = 2371926634593
BaseRepresentation
bin10011110010110111…
…000111110001011110
32000212020220122201010
4103302313013301132
5322012111431324
613433015400050
71351463314650
oct236267076136
960766818633
1021254405214
119017615249
124152083026
13200953a643
141058b386d0
15845e51829
hex4f2dc7c5e

21254405214 has 32 divisors (see below), whose sum is σ = 51138420480. Its totient is φ = 5753071872.

The previous prime is 21254405209. The next prime is 21254405219. The reversal of 21254405214 is 41250445212.

It is an interprime number because it is at equal distance from previous prime (21254405209) and next prime (21254405219).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254405219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13316499 + ... + 13318094.

It is an arithmetic number, because the mean of its divisors is an integer number (1598075640).

Almost surely, 221254405214 is an apocalyptic number.

21254405214 is an abundant number, since it is smaller than the sum of its proper divisors (29884015266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21254405214 is a wasteful number, since it uses less digits than its factorization.

21254405214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26634624.

The product of its (nonzero) digits is 12800, while the sum is 30.

The spelling of 21254405214 in words is "twenty-one billion, two hundred fifty-four million, four hundred five thousand, two hundred fourteen".

Divisors: 1 2 3 6 7 14 19 21 38 42 57 114 133 266 399 798 26634593 53269186 79903779 159807558 186442151 372884302 506057267 559326453 1012114534 1118652906 1518171801 3036343602 3542400869 7084801738 10627202607 21254405214