21154625027 has 8 divisors (see below), whose sum is σ = 21363255264. Its totient is φ = 20946057408.

The previous prime is 21154625021. The next prime is 21154625039. The reversal of 21154625027 is 72052645112.

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

It is a cyclic number.

It is not a de Polignac number, because 21154625027 - 2²² = 21150430723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21154625021) by changing a digit.

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, 960713 + ... + 982485.

It is an arithmetic number, because the mean of its divisors is an integer number (2670406908).

Almost surely, 2^21154625027 is an apocalyptic number.

21154625027 is a deficient number, since it is larger than the sum of its proper divisors (208630237).

21154625027 is a wasteful number, since it uses less digits than its factorization.

21154625027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31309.

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 21154625027 in words is "twenty-one billion, one hundred fifty-four million, six hundred twenty-five thousand, twenty-seven".