21355463107770 has 64 divisors (see below), whose sum is σ = 58343462866944. Its totient is φ = 4951991443520.

The previous prime is 21355463107763. The next prime is 21355463107799. The reversal of 21355463107770 is 7770136455312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1406808162 + ... + 1406823341.

It is an arithmetic number, because the mean of its divisors is an integer number (911616607296).

Almost surely, 2^{21355463107770} is an apocalyptic number.

21355463107770 is an abundant number, since it is smaller than the sum of its proper divisors (36987999759174).

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

21355463107770 is a wasteful number, since it uses less digits than its factorization.

21355463107770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813631547.

The product of its (nonzero) digits is 3704400, while the sum is 51.

The spelling of 21355463107770 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-three million, one hundred seven thousand, seven hundred seventy".