20888951040 has 108 divisors (see below), whose sum is σ = 72273634524. Its totient is φ = 5570383872.

The previous prime is 20888951023. The next prime is 20888951087. The reversal of 20888951040 is 4015988802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8573278464 + 12315672576 = 92592^2 + 110976^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 895119 + ... + 918158.

Almost surely, 2^20888951040 is an apocalyptic number.

20888951040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20888951040 is an abundant number, since it is smaller than the sum of its proper divisors (51384683484).

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

20888951040 is a wasteful number, since it uses less digits than its factorization.

20888951040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813304 (or 1813287 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 20888951040 in words is "twenty billion, eight hundred eighty-eight million, nine hundred fifty-one thousand, forty".