20723870240 has 48 divisors (see below), whose sum is σ = 49007125440. Its totient is φ = 8281593600.

The previous prime is 20723870231. The next prime is 20723870261. The reversal of 20723870240 is 4207832702.

It is a self number, because there is not a number n which added to its sum of digits gives 20723870240.

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, 106541 + ... + 229779.

It is an arithmetic number, because the mean of its divisors is an integer number (1020981780).

Almost surely, 2^20723870240 is an apocalyptic number.

20723870240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20723870240 is an abundant number, since it is smaller than the sum of its proper divisors (28283255200).

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

20723870240 is a wasteful number, since it uses less digits than its factorization.

20723870240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124305 (or 124297 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The spelling of 20723870240 in words is "twenty billion, seven hundred twenty-three million, eight hundred seventy thousand, two hundred forty".