20507633420 has 48 divisors (see below), whose sum is σ = 43497403488. Its totient is φ = 8121185280.

The previous prime is 20507633407. The next prime is 20507633459. The reversal of 20507633420 is 2433670502.

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, 1125422 + ... + 1143498.

It is an arithmetic number, because the mean of its divisors is an integer number (906195906).

Almost surely, 2^20507633420 is an apocalyptic number.

20507633420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20507633420 is an abundant number, since it is smaller than the sum of its proper divisors (22989770068).

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

20507633420 is a wasteful number, since it uses less digits than its factorization.

20507633420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18650 (or 18648 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The spelling of 20507633420 in words is "twenty billion, five hundred seven million, six hundred thirty-three thousand, four hundred twenty".