20105607550 has 48 divisors (see below), whose sum is σ = 44597002752. Its totient is φ = 6593637600.

The previous prime is 20105607517. The next prime is 20105607589. The reversal of 20105607550 is 5570650102.

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, 1240746 + ... + 1256845.

It is an arithmetic number, because the mean of its divisors is an integer number (929104224).

Almost surely, 2^20105607550 is an apocalyptic number.

20105607550 is an abundant number, since it is smaller than the sum of its proper divisors (24491395202).

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

20105607550 is a wasteful number, since it uses less digits than its factorization.

20105607550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497633 (or 2497628 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 20105607550 in words is "twenty billion, one hundred five million, six hundred seven thousand, five hundred fifty".