20163057550 has 12 divisors (see below), whose sum is σ = 37503287136. Its totient is φ = 8065223000.

The previous prime is 20163057527. The next prime is 20163057599. The reversal of 20163057550 is 5575036102.

It is a super-2 number, since 2×20163057550² (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 5 ways as a sum of consecutive naturals, for example, 201630526 + ... + 201630625.

It is an arithmetic number, because the mean of its divisors is an integer number (3125273928).

Almost surely, 2^20163057550 is an apocalyptic number.

20163057550 is a deficient number, since it is larger than the sum of its proper divisors (17340229586).

20163057550 is a wasteful number, since it uses less digits than its factorization.

20163057550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403261163 (or 403261158 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 34.

The spelling of 20163057550 in words is "twenty billion, one hundred sixty-three million, fifty-seven thousand, five hundred fifty".