20776725 has 36 divisors (see below), whose sum is σ = 37604736. Its totient is φ = 10964640.

The previous prime is 20776711. The next prime is 20776739. The reversal of 20776725 is 52767702.

It is an interprime number because it is at equal distance from previous prime (20776711) and next prime (20776739).

It is not a de Polignac number, because 20776725 - 2⁷ = 20776597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20776725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23644 + ... + 24506.

It is an arithmetic number, because the mean of its divisors is an integer number (1044576).

Almost surely, 2^20776725 is an apocalyptic number.

20776725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20776725 is a deficient number, since it is larger than the sum of its proper divisors (16828011).

20776725 is a wasteful number, since it uses less digits than its factorization.

20776725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 20776725 is about 4558.1492954926. The cubic root of 20776725 is about 274.9111558733.

The spelling of 20776725 in words is "twenty million, seven hundred seventy-six thousand, seven hundred twenty-five".