20697795 has 32 divisors (see below), whose sum is σ = 37094400. Its totient is φ = 10949472.

The previous prime is 20697779. The next prime is 20697797. The reversal of 20697795 is 59779602.

20697795 = T₆₇₄ + T₆₇₅ + ... + T₇₅₄.

It is not a de Polignac number, because 20697795 - 2⁴ = 20697779 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20697795.

It is not an unprimeable number, because it can be changed into a prime (20697797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18214 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (1159200).

Almost surely, 2^20697795 is an apocalyptic number.

20697795 is a deficient number, since it is larger than the sum of its proper divisors (16396605).

20697795 is a wasteful number, since it uses less digits than its factorization.

20697795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 20697795 is about 4549.4829376535. The cubic root of 20697795 is about 274.5625883739.

The spelling of 20697795 in words is "twenty million, six hundred ninety-seven thousand, seven hundred ninety-five".