20157110550 has 48 divisors (see below), whose sum is σ = 55544041680. Its totient is φ = 5375229120.

The previous prime is 20157110531. The next prime is 20157110551. The reversal of 20157110550 is 5501175102.

20157110550 is a `hidden beast` number, since 20 + 15 + 71 + 10 + 550 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157110551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7464247 + ... + 7466946.

It is an arithmetic number, because the mean of its divisors is an integer number (1157167535).

Almost surely, 2^20157110550 is an apocalyptic number.

20157110550 is an abundant number, since it is smaller than the sum of its proper divisors (35386931130).

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

20157110550 is a wasteful number, since it uses less digits than its factorization.

20157110550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14931214 (or 14931203 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

Adding to 20157110550 its reverse (5501175102), we get a palindrome (25658285652).

The spelling of 20157110550 in words is "twenty billion, one hundred fifty-seven million, one hundred ten thousand, five hundred fifty".