20379215720 has 32 divisors (see below), whose sum is σ = 46281780000. Its totient is φ = 8075500608.

The previous prime is 20379215699. The next prime is 20379215741. The reversal of 20379215720 is 2751297302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20379215699) and next prime (20379215741).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376470 + ... + 2385029.

It is an arithmetic number, because the mean of its divisors is an integer number (1446305625).

Almost surely, 2^20379215720 is an apocalyptic number.

20379215720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20379215720 is an abundant number, since it is smaller than the sum of its proper divisors (25902564280).

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

20379215720 is a wasteful number, since it uses less digits than its factorization.

20379215720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761617 (or 4761613 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 20379215720 in words is "twenty billion, three hundred seventy-nine million, two hundred fifteen thousand, seven hundred twenty".