20769025 has 12 divisors (see below), whose sum is σ = 26450812. Its totient is φ = 16165440.

The previous prime is 20768999. The next prime is 20769029. The reversal of 20769025 is 52096702.

It can be written as a sum of positive squares in 6 ways, for example, as 410881 + 20358144 = 641^2 + 4512^2 .

It is not a de Polignac number, because 20769025 - 2¹⁵ = 20736257 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20769029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10302 + ... + 12151.

Almost surely, 2^20769025 is an apocalyptic number.

20769025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20769025 is a deficient number, since it is larger than the sum of its proper divisors (5681787).

20769025 is a wasteful number, since it uses less digits than its factorization.

20769025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22500 (or 22495 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20769025 is about 4557.3045761722. The cubic root of 20769025 is about 274.8771903428.

The spelling of 20769025 in words is "twenty million, seven hundred sixty-nine thousand, twenty-five".