20931483420 has 36 divisors (see below), whose sum is σ = 63492166920. Its totient is φ = 5581728864.

The previous prime is 20931483403. The next prime is 20931483421. The reversal of 20931483420 is 2438413902.

20931483420 is a `hidden beast` number, since 2 + 0 + 93 + 148 + 3 + 420 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20931483421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58142830 + ... + 58143189.

Almost surely, 2^20931483420 is an apocalyptic number.

20931483420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20931483420 is an abundant number, since it is smaller than the sum of its proper divisors (42560683500).

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

20931483420 is a wasteful number, since it uses less digits than its factorization.

20931483420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116286034 (or 116286029 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20931483420 in words is "twenty billion, nine hundred thirty-one million, four hundred eighty-three thousand, four hundred twenty".