20553835036 has 24 divisors (see below), whose sum is σ = 41316349536. Its totient is φ = 8764069440.

The previous prime is 20553835031. The next prime is 20553835037. The reversal of 20553835036 is 63053835502.

It is a super-2 number, since 2×20553835036² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20553835036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553835031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1857595 + ... + 1868626.

It is an arithmetic number, because the mean of its divisors is an integer number (1721514564).

Almost surely, 2^20553835036 is an apocalyptic number.

It is an amenable number.

20553835036 is an abundant number, since it is smaller than the sum of its proper divisors (20762514500).

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

20553835036 is a wasteful number, since it uses less digits than its factorization.

20553835036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726429 (or 3726427 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 20553835036 in words is "twenty billion, five hundred fifty-three million, eight hundred thirty-five thousand, thirty-six".