2105157924 has 45 divisors (see below), whose sum is σ = 5505458497. Its totient is φ = 701444016.

The previous prime is 2105157907. The next prime is 2105157949. The reversal of 2105157924 is 4297515012.

The square root of 2105157924 is 45882.

It is a perfect power (a square), and thus also a powerful number.

2105157924 is a `hidden beast` number, since 2 + 10 + 51 + 579 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1946397924 + 158760000 = 44118^2 + 12600^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 824602 + ... + 827150.

Almost surely, 2^2105157924 is an apocalyptic number.

2105157924 is the 45882-nd square number.

It is an amenable number.

2105157924 is an abundant number, since it is smaller than the sum of its proper divisors (3400300573).

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

2105157924 is an frugal number, since it uses more digits than its factorization.

2105157924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The cubic root of 2105157924 is about 1281.6267411203.

Multiplying 2105157924 by its sum of digits (36), we get a square (75785685264 = 275292²).

2105157924 divided by its sum of digits (36) gives a square (58476609 = 7647²).

The spelling of 2105157924 in words is "two billion, one hundred five million, one hundred fifty-seven thousand, nine hundred twenty-four".