21301542108 has 96 divisors (see below), whose sum is σ = 68853496320. Its totient is φ = 5532865920.

The previous prime is 21301542107. The next prime is 21301542127. The reversal of 21301542108 is 80124510312.

21301542108 is a `hidden beast` number, since 2 + 13 + 0 + 1 + 542 + 108 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301542103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1272441 + ... + 1289072.

It is an arithmetic number, because the mean of its divisors is an integer number (717223920).

Almost surely, 2^21301542108 is an apocalyptic number.

21301542108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21301542108 is an abundant number, since it is smaller than the sum of its proper divisors (47551954212).

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

21301542108 is a wasteful number, since it uses less digits than its factorization.

21301542108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561544 (or 2561536 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 21301542108 in words is "twenty-one billion, three hundred one million, five hundred forty-two thousand, one hundred eight".