24999999940 has 12 divisors (see below), whose sum is σ = 52499999916. Its totient is φ = 9999999968.

The previous prime is 24999999931. The next prime is 24999999991. The reversal of 24999999940 is 4999999942.

It can be written as a sum of positive squares in 2 ways, for example, as 16966104516 + 8033895424 = 130254^2 + 89632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624999979 + ... + 625000018.

It is an arithmetic number, because the mean of its divisors is an integer number (4374999993).

Almost surely, 2^24999999940 is an apocalyptic number.

24999999940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24999999940 is an abundant number, since it is smaller than the sum of its proper divisors (27499999976).

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

24999999940 is a wasteful number, since it uses less digits than its factorization.

24999999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250000006 (or 1250000004 counting only the distinct ones).

The product of its (nonzero) digits is 153055008, while the sum is 73.

The spelling of 24999999940 in words is "twenty-four billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty".