20508650000 has 60 divisors (see below), whose sum is σ = 49666328964. Its totient is φ = 8203440000.

The previous prime is 20508649979. The next prime is 20508650011. The reversal of 20508650000 is 5680502.

It can be written as a sum of positive squares in 6 ways, for example, as 19761611776 + 747038224 = 140576^2 + 27332^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155087 + ... + 255086.

Almost surely, 2^20508650000 is an apocalyptic number.

20508650000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20508650000 is an abundant number, since it is smaller than the sum of its proper divisors (29157678964).

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

20508650000 is an frugal number, since it uses more digits than its factorization.

20508650000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410206 (or 410180 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20508650000 in words is "twenty billion, five hundred eight million, six hundred fifty thousand".