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21375752 = 232671969
BaseRepresentation
bin101000110001…
…0101100001000
31111020000000112
41101202230020
520433011002
62042053452
7346455656
oct121425410
944200015
1021375752
111107aa12
1271aa288
134575698
142ba5dd6
151d23852
hex1462b08

21375752 has 8 divisors (see below), whose sum is σ = 40079550. Its totient is φ = 10687872.

The previous prime is 21375743. The next prime is 21375791. The reversal of 21375752 is 25757312.

It can be written as a sum of positive squares in only one way, i.e., 20921476 + 454276 = 4574^2 + 674^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335977 + ... + 1335992.

Almost surely, 221375752 is an apocalyptic number.

It is an amenable number.

21375752 is a deficient number, since it is larger than the sum of its proper divisors (18703798).

21375752 is a wasteful number, since it uses less digits than its factorization.

21375752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671975 (or 2671971 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 21375752 is about 4623.3918285172. The cubic root of 21375752 is about 277.5282096691.

The spelling of 21375752 in words is "twenty-one million, three hundred seventy-five thousand, seven hundred fifty-two".

Divisors: 1 2 4 8 2671969 5343938 10687876 21375752