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21451430627 = 111950130057
BaseRepresentation
bin10011111110100110…
…101101101011100011
32001100222122120202122
4103332212231223203
5322413031240002
613504334334455
71356405103034
oct237646555343
961328576678
1021451430627
119108856370
1241a805a42b
13203b2c2a23
141076d84a8b
158583be6a2
hex4fe9adae3

21451430627 has 4 divisors (see below), whose sum is σ = 23401560696. Its totient is φ = 19501300560.

The previous prime is 21451430573. The next prime is 21451430629. The reversal of 21451430627 is 72603415412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21451430627 - 210 = 21451429603 is a prime.

It is a super-2 number, since 2×214514306272 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21451430629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975065018 + ... + 975065039.

It is an arithmetic number, because the mean of its divisors is an integer number (5850390174).

Almost surely, 221451430627 is an apocalyptic number.

21451430627 is a deficient number, since it is larger than the sum of its proper divisors (1950130069).

21451430627 is a wasteful number, since it uses less digits than its factorization.

21451430627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950130068.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 21451430627 in words is "twenty-one billion, four hundred fifty-one million, four hundred thirty thousand, six hundred twenty-seven".

Divisors: 1 11 1950130057 21451430627