20962696225 has 27 divisors (see below), whose sum is σ = 27194643763. Its totient is φ = 16028278640.

The previous prime is 20962696199. The next prime is 20962696229. The reversal of 20962696225 is 52269626902.

The square root of 20962696225 is 144785.

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., 7546570641 + 13416125584 = 86871^2 + 115828^2 .

It is not a de Polignac number, because 20962696225 - 2¹¹ = 20962694177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20962696229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16649646 + ... + 16650904.

Almost surely, 2^20962696225 is an apocalyptic number.

20962696225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20962696225 is the 144785-th square number.

20962696225 is the 72393-rd centered octagonal number.

It is an amenable number.

20962696225 is a deficient number, since it is larger than the sum of its proper divisors (6231947538).

20962696225 is an frugal number, since it uses more digits than its factorization.

20962696225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

Multiplying 20962696225 by its sum of digits (49), we get a square (1027172115025 = 1013495²).

The spelling of 20962696225 in words is "twenty billion, nine hundred sixty-two million, six hundred ninety-six thousand, two hundred twenty-five".