20136525550 has 36 divisors (see below), whose sum is σ = 38790068616. Its totient is φ = 7776848800.

The previous prime is 20136525523. The next prime is 20136525581. The reversal of 20136525550 is 5552563102.

It is a super-2 number, since 2×20136525550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 197386 + ... + 281485.

It is an arithmetic number, because the mean of its divisors is an integer number (1077501906).

Almost surely, 2^20136525550 is an apocalyptic number.

20136525550 is a deficient number, since it is larger than the sum of its proper divisors (18653543066).

20136525550 is a wasteful number, since it uses less digits than its factorization.

20136525550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478941 (or 478907 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 20136525550 in words is "twenty billion, one hundred thirty-six million, five hundred twenty-five thousand, five hundred fifty".