21706472202 has 16 divisors (see below), whose sum is σ = 45966647232. Its totient is φ = 6809873600.

The previous prime is 21706472173. The next prime is 21706472243. The reversal of 21706472202 is 20227460712.

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, 106404174 + ... + 106404377.

It is an arithmetic number, because the mean of its divisors is an integer number (2872915452).

Almost surely, 2^21706472202 is an apocalyptic number.

21706472202 is an abundant number, since it is smaller than the sum of its proper divisors (24260175030).

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

21706472202 is a wasteful number, since it uses less digits than its factorization.

21706472202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212808573.

The product of its (nonzero) digits is 18816, while the sum is 33.

The spelling of 21706472202 in words is "twenty-one billion, seven hundred six million, four hundred seventy-two thousand, two hundred two".