20893257025 has 9 divisors (see below), whose sum is σ = 25908534921. Its totient is φ = 16714027440.

The previous prime is 20893256999. The next prime is 20893257029. The reversal of 20893257025 is 52075239802.

The square root of 20893257025 is 144545.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6821603649 + 14071653376 = 82593^2 + 118624^2 .

It is not a de Polignac number, because 20893257025 - 2¹³ = 20893248833 is a prime.

It is a super-2 number, since 2×20893257025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20893257029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 708271 + ... + 737179.

Almost surely, 2^20893257025 is an apocalyptic number.

20893257025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20893257025 is the 144545-th square number.

20893257025 is the 72273-rd centered octagonal number.

It is an amenable number.

20893257025 is a deficient number, since it is larger than the sum of its proper divisors (5015277896).

20893257025 is an frugal number, since it uses more digits than its factorization.

20893257025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57828 (or 28914 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 20893257025 in words is "twenty billion, eight hundred ninety-three million, two hundred fifty-seven thousand, twenty-five".