20552885901 has 6 divisors (see below), whose sum is σ = 29687501870. Its totient is φ = 13701923928.

The previous prime is 20552885867. The next prime is 20552885909. The reversal of 20552885901 is 10958825502.

It is a happy number.

20552885901 is a `hidden beast` number, since 2 + 0 + 5 + 52 + 8 + 8 + 590 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11996820900 + 8556065001 = 109530^2 + 92499^2 .

It is not a de Polignac number, because 20552885901 - 2¹⁴ = 20552869517 is a prime.

It is a super-2 number, since 2×20552885901² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552885909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1141826986 + ... + 1141827003.

Almost surely, 2^20552885901 is an apocalyptic number.

It is an amenable number.

20552885901 is a deficient number, since it is larger than the sum of its proper divisors (9134615969).

20552885901 is a wasteful number, since it uses less digits than its factorization.

20552885901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283653995 (or 2283653992 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 20552885901 in words is "twenty billion, five hundred fifty-two million, eight hundred eighty-five thousand, nine hundred one".