21526161074 has 32 divisors (see below), whose sum is σ = 37272821760. Its totient is φ = 9221072400.

The previous prime is 21526161049. The next prime is 21526161077. The reversal of 21526161074 is 47016162512.

It is a super-2 number, since 2×21526161074² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21526161077) 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, 54974 + ... + 214649.

It is an arithmetic number, because the mean of its divisors is an integer number (1164775680).

Almost surely, 2^21526161074 is an apocalyptic number.

21526161074 is a deficient number, since it is larger than the sum of its proper divisors (15746660686).

21526161074 is a wasteful number, since it uses less digits than its factorization.

21526161074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269846.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 21526161074 in words is "twenty-one billion, five hundred twenty-six million, one hundred sixty-one thousand, seventy-four".