29720036025 has 63 divisors (see below), whose sum is σ = 55297293181. Its totient is φ = 15838273440.

The previous prime is 29720036023. The next prime is 29720036057. The reversal of 29720036025 is 52063002792.

The square root of 29720036025 is 172395.

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

29720036025 is a `hidden beast` number, since 2 + 97 + 200 + 360 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9308601 + 29710727424 = 3051^2 + 172368^2 .

It is not a de Polignac number, because 29720036025 - 2¹ = 29720036023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29720036023) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 23272687 + ... + 23273963.

Almost surely, 2^29720036025 is an apocalyptic number.

29720036025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29720036025 is the 172395-th square number.

29720036025 is the 86198-th centered octagonal number.

It is an amenable number.

29720036025 is a deficient number, since it is larger than the sum of its proper divisors (25577257156).

29720036025 is an frugal number, since it uses more digits than its factorization.

29720036025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Multiplying 29720036025 by its sum of digits (36), we get a square (1069921296900 = 1034370²).

The spelling of 29720036025 in words is "twenty-nine billion, seven hundred twenty million, thirty-six thousand, twenty-five".