20769475 has 12 divisors (see below), whose sum is σ = 26192520. Its totient is φ = 16332800.

The previous prime is 20769467. The next prime is 20769479. The reversal of 20769475 is 57496702.

It is not a de Polignac number, because 20769475 - 2³ = 20769467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20769479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5566 + ... + 8515.

It is an arithmetic number, because the mean of its divisors is an integer number (2182710).

Almost surely, 2^20769475 is an apocalyptic number.

20769475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20769475 is a deficient number, since it is larger than the sum of its proper divisors (5423045).

20769475 is a wasteful number, since it uses less digits than its factorization.

20769475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14150 (or 14145 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 20769475 is about 4557.3539471935. The cubic root of 20769475 is about 274.8791755723.

The spelling of 20769475 in words is "twenty million, seven hundred sixty-nine thousand, four hundred seventy-five".