21427618360 has 32 divisors (see below), whose sum is σ = 48226266000. Its totient is φ = 8568536320.

The previous prime is 21427618351. The next prime is 21427618361. The reversal of 21427618360 is 6381672412.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21427618361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62916 + ... + 216364.

Almost surely, 2^21427618360 is an apocalyptic number.

21427618360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21427618360 is an abundant number, since it is smaller than the sum of its proper divisors (26798647640).

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

21427618360 is a wasteful number, since it uses less digits than its factorization.

21427618360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156951 (or 156947 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21427618360 in words is "twenty-one billion, four hundred twenty-seven million, six hundred eighteen thousand, three hundred sixty".