21054813028 has 12 divisors (see below), whose sum is σ = 37000091520. Its totient is φ = 10483358312.

The previous prime is 21054813023. The next prime is 21054813041. The reversal of 21054813028 is 82031845012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21054812984 and 21054813002.

It is not an unprimeable number, because it can be changed into a prime (21054813023) 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, 11010976 + ... + 11012887.

It is an arithmetic number, because the mean of its divisors is an integer number (3083340960).

Almost surely, 2^21054813028 is an apocalyptic number.

It is an amenable number.

21054813028 is a deficient number, since it is larger than the sum of its proper divisors (15945278492).

21054813028 is a wasteful number, since it uses less digits than its factorization.

21054813028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22024106 (or 22024104 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 21054813028 in words is "twenty-one billion, fifty-four million, eight hundred thirteen thousand, twenty-eight".