20870237340 has 72 divisors (see below), whose sum is σ = 67030301520. Its totient is φ = 5238019584.

The previous prime is 20870237321. The next prime is 20870237417. The reversal of 20870237340 is 4373207802.

20870237340 is a `hidden beast` number, since 2 + 0 + 87 + 0 + 237 + 340 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20870237295 and 20870237304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3407110 + ... + 3413229.

It is an arithmetic number, because the mean of its divisors is an integer number (930976410).

Almost surely, 2^20870237340 is an apocalyptic number.

20870237340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20870237340 is an abundant number, since it is smaller than the sum of its proper divisors (46160064180).

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

20870237340 is a wasteful number, since it uses less digits than its factorization.

20870237340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820371 (or 6820366 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 20870237340 in words is "twenty billion, eight hundred seventy million, two hundred thirty-seven thousand, three hundred forty".