21537425520074 has 16 divisors (see below), whose sum is σ = 32346713517120. Its totient is φ = 10755191840640.

The previous prime is 21537425520071. The next prime is 21537425520101. The reversal of 21537425520074 is 47002552473512.

It is not an unprimeable number, because it can be changed into a prime (21537425520071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9351437 + ... + 11424719.

It is an arithmetic number, because the mean of its divisors is an integer number (2021669594820).

Almost surely, 2^{21537425520074} is an apocalyptic number.

21537425520074 is a deficient number, since it is larger than the sum of its proper divisors (10809287997046).

21537425520074 is a wasteful number, since it uses less digits than its factorization.

21537425520074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079805.

The product of its (nonzero) digits is 2352000, while the sum is 47.

Adding to 21537425520074 its reverse (47002552473512), we get a palindrome (68539977993586).

The spelling of 21537425520074 in words is "twenty-one trillion, five hundred thirty-seven billion, four hundred twenty-five million, five hundred twenty thousand, seventy-four".