20142705625 has 45 divisors (see below), whose sum is σ = 29315913561. Its totient is φ = 13795110000.

The previous prime is 20142705593. The next prime is 20142705631. The reversal of 20142705625 is 52650724102.

The square root of 20142705625 is 141925.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1579188121 + 18563517504 = 39739^2 + 136248^2 .

It is not a de Polignac number, because 20142705625 - 2⁵ = 20142705593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 24836470 + ... + 24837280.

Almost surely, 2^20142705625 is an apocalyptic number.

20142705625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20142705625 is the 141925-th square number.

20142705625 is the 70963-rd centered octagonal number.

It is an amenable number.

20142705625 is a deficient number, since it is larger than the sum of its proper divisors (9173207936).

20142705625 is an frugal number, since it uses more digits than its factorization.

20142705625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 20142705625 in words is "twenty billion, one hundred forty-two million, seven hundred five thousand, six hundred twenty-five".