20252420550 has 48 divisors (see below), whose sum is σ = 55806673680. Its totient is φ = 5400645120.

The previous prime is 20252420537. The next prime is 20252420563. The reversal of 20252420550 is 5502425202.

20252420550 is a `hidden beast` number, since 20 + 2 + 52 + 42 + 0 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (20252420537) and next prime (20252420563).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7499547 + ... + 7502246.

It is an arithmetic number, because the mean of its divisors is an integer number (1162639035).

Almost surely, 2^20252420550 is an apocalyptic number.

20252420550 is an abundant number, since it is smaller than the sum of its proper divisors (35554253130).

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

20252420550 is a wasteful number, since it uses less digits than its factorization.

20252420550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15001814 (or 15001803 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

Adding to 20252420550 its reverse (5502425202), we get a palindrome (25754845752).

The spelling of 20252420550 in words is "twenty billion, two hundred fifty-two million, four hundred twenty thousand, five hundred fifty".