21270276264 has 32 divisors (see below), whose sum is σ = 54891037440. Its totient is φ = 6861379200.

The previous prime is 21270276217. The next prime is 21270276281. The reversal of 21270276264 is 46267207212.

It is a happy 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, 14293797 + ... + 14295284.

It is an arithmetic number, because the mean of its divisors is an integer number (1715344920).

Almost surely, 2^21270276264 is an apocalyptic number.

21270276264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21270276264 is an abundant number, since it is smaller than the sum of its proper divisors (33620761176).

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

21270276264 is a wasteful number, since it uses less digits than its factorization.

21270276264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28589121 (or 28589117 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21270276264 in words is "twenty-one billion, two hundred seventy million, two hundred seventy-six thousand, two hundred sixty-four".