21065435130 has 32 divisors (see below), whose sum is σ = 50562043200. Its totient is φ = 5616893952.

The previous prime is 21065435129. The next prime is 21065435161. The reversal of 21065435130 is 3153456012.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340101 + ... + 397239.

It is an arithmetic number, because the mean of its divisors is an integer number (1580063850).

Almost surely, 2^21065435130 is an apocalyptic number.

21065435130 is an abundant number, since it is smaller than the sum of its proper divisors (29496608070).

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

21065435130 is a wasteful number, since it uses less digits than its factorization.

21065435130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69438.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21065435130 in words is "twenty-one billion, sixty-five million, four hundred thirty-five thousand, one hundred thirty".