20690552600 has 48 divisors (see below), whose sum is σ = 48116451600. Its totient is φ = 8274343040.

The previous prime is 20690552527. The next prime is 20690552609. The reversal of 20690552600 is 625509602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20690552609) by changing a digit.

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, 1167002 + ... + 1184598.

It is an arithmetic number, because the mean of its divisors is an integer number (1002426075).

Almost surely, 2^20690552600 is an apocalyptic number.

20690552600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20690552600 is an abundant number, since it is smaller than the sum of its proper divisors (27425899000).

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

20690552600 is a wasteful number, since it uses less digits than its factorization.

20690552600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23492 (or 23483 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 20690552600 in words is "twenty billion, six hundred ninety million, five hundred fifty-two thousand, six hundred".