21015150054 has 16 divisors (see below), whose sum is σ = 42032183040. Its totient is φ = 7004736200.

The previous prime is 21015150047. The next prime is 21015150097. The reversal of 21015150054 is 45005151012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96727 + ... + 226685.

It is an arithmetic number, because the mean of its divisors is an integer number (2627011440).

Almost surely, 2^21015150054 is an apocalyptic number.

21015150054 is an abundant number, since it is smaller than the sum of its proper divisors (21017032986).

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

21015150054 is a wasteful number, since it uses less digits than its factorization.

21015150054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156915.

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 21015150054 in words is "twenty-one billion, fifteen million, one hundred fifty thousand, fifty-four".