21031530054 has 8 divisors (see below), whose sum is σ = 42063060120. Its totient is φ = 7010510016.

The previous prime is 21031530031. The next prime is 21031530067. The reversal of 21031530054 is 45003513012.

It is a sphenic number, since it is the product of 3 distinct primes.

21031530054 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1752627499 + ... + 1752627510.

It is an arithmetic number, because the mean of its divisors is an integer number (5257882515).

Almost surely, 2^21031530054 is an apocalyptic number.

21031530054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031530054 is a wasteful number, since it uses less digits than its factorization.

21031530054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505255014.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21031530054 in words is "twenty-one billion, thirty-one million, five hundred thirty thousand, fifty-four".