21642852470 has 32 divisors (see below), whose sum is σ = 39047757696. Its totient is φ = 8637033600.

The previous prime is 21642852467. The next prime is 21642852487. The reversal of 21642852470 is 7425824612.

It is a happy number.

It is a congruent number.

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, 15671180 + ... + 15672560.

It is an arithmetic number, because the mean of its divisors is an integer number (1220242428).

Almost surely, 2^21642852470 is an apocalyptic number.

21642852470 is a deficient number, since it is larger than the sum of its proper divisors (17404905226).

21642852470 is a wasteful number, since it uses less digits than its factorization.

21642852470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 21642852470 in words is "twenty-one billion, six hundred forty-two million, eight hundred fifty-two thousand, four hundred seventy".