21425399207770 has 32 divisors (see below), whose sum is σ = 40243193597952. Its totient is φ = 8197400504832.

The previous prime is 21425399207767. The next prime is 21425399207789. The reversal of 21425399207770 is 7770299352412.

It is a super-2 number, since 2×21425399207770² (a number of 27 digits) contains 22 as substring.

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, 12844554 + ... + 14416426.

It is an arithmetic number, because the mean of its divisors is an integer number (1257599799936).

Almost surely, 2^{21425399207770} is an apocalyptic number.

21425399207770 is a deficient number, since it is larger than the sum of its proper divisors (18817794390182).

21425399207770 is a wasteful number, since it uses less digits than its factorization.

21425399207770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631166.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 21425399207770 in words is "twenty-one trillion, four hundred twenty-five billion, three hundred ninety-nine million, two hundred seven thousand, seven hundred seventy".