20201505424 has 15 divisors (see below), whose sum is σ = 39141518313. Its totient is φ = 10100468448.

The previous prime is 20201505397. The next prime is 20201505431. The reversal of 20201505424 is 42450510202.

The square root of 20201505424 is 142132.

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

It can be written as a sum of positive squares in only one way, i.e., 944947600 + 19256557824 = 30740^2 + 138768^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 550762 + ... + 586294.

Almost surely, 2^20201505424 is an apocalyptic number.

20201505424 is the 142132-nd square number.

It is an amenable number.

20201505424 is a deficient number, since it is larger than the sum of its proper divisors (18940012889).

20201505424 is an frugal number, since it uses more digits than its factorization.

20201505424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71074 (or 35535 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Multiplying 20201505424 by its sum of digits (25), we get a square (505037635600 = 710660²).

It can be divided in two parts, 20201 and 505424, that added together give a square (525625 = 725²).

The spelling of 20201505424 in words is "twenty billion, two hundred one million, five hundred five thousand, four hundred twenty-four".