20426603550 has 48 divisors (see below), whose sum is σ = 50803258800. Its totient is φ = 5431472640.

The previous prime is 20426603507. The next prime is 20426603663. The reversal of 20426603550 is 5530662402.

It is a super-2 number, since 2×20426603550² (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 23 ways as a sum of consecutive naturals, for example, 142747 + ... + 247446.

It is an arithmetic number, because the mean of its divisors is an integer number (1058401225).

Almost surely, 2^20426603550 is an apocalyptic number.

20426603550 is an abundant number, since it is smaller than the sum of its proper divisors (30376655250).

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

20426603550 is a wasteful number, since it uses less digits than its factorization.

20426603550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390557 (or 390552 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 20426603550 in words is "twenty billion, four hundred twenty-six million, six hundred three thousand, five hundred fifty".