21054524026 has 16 divisors (see below), whose sum is σ = 31716832680. Its totient is φ = 10482278400.

The previous prime is 21054523969. The next prime is 21054524041. The reversal of 21054524026 is 62042545012.

It can be written as a sum of positive squares in 4 ways, for example, as 15688815025 + 5365709001 = 125255^2 + 73251^2 .

It is a super-2 number, since 2×21054524026² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690510 + ... + 1702918.

Almost surely, 2^21054524026 is an apocalyptic number.

21054524026 is a deficient number, since it is larger than the sum of its proper divisors (10662308654).

21054524026 is a wasteful number, since it uses less digits than its factorization.

21054524026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15969.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 21054524026 in words is "twenty-one billion, fifty-four million, five hundred twenty-four thousand, twenty-six".