207540021400 has 48 divisors (see below), whose sum is σ = 498096066240. Its totient is φ = 80338070400.

The previous prime is 207540021391. The next prime is 207540021467. The reversal of 207540021400 is 4120045702.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16730899 + ... + 16743298.

It is an arithmetic number, because the mean of its divisors is an integer number (10377001380).

Almost surely, 2^207540021400 is an apocalyptic number.

207540021400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207540021400 is an abundant number, since it is smaller than the sum of its proper divisors (290556044840).

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

207540021400 is a wasteful number, since it uses less digits than its factorization.

207540021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33474244 (or 33474235 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The spelling of 207540021400 in words is "two hundred seven billion, five hundred forty million, twenty-one thousand, four hundred".