421504864420 has 12 divisors (see below), whose sum is σ = 885160215324. Its totient is φ = 168601945760.

The previous prime is 421504864387. The next prime is 421504864453. The reversal of 421504864420 is 24468405124.

It is an interprime number because it is at equal distance from previous prime (421504864387) and next prime (421504864453).

It can be written as a sum of positive squares in 2 ways, for example, as 134303192676 + 287201671744 = 366474^2 + 535912^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10537621591 + ... + 10537621630.

It is an arithmetic number, because the mean of its divisors is an integer number (73763351277).

Almost surely, 2^421504864420 is an apocalyptic number.

It is an amenable number.

421504864420 is an abundant number, since it is smaller than the sum of its proper divisors (463655350904).

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

421504864420 is a wasteful number, since it uses less digits than its factorization.

421504864420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21075243230 (or 21075243228 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 421504864420 in words is "four hundred twenty-one billion, five hundred four million, eight hundred sixty-four thousand, four hundred twenty".