20755475 has 12 divisors (see below), whose sum is σ = 27716976. Its totient is φ = 15326880.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755475 is 57455702.

It is a happy number.

It is not a de Polignac number, because 20755475 - 2⁴ = 20755459 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31607 + ... + 32256.

It is an arithmetic number, because the mean of its divisors is an integer number (2309748).

Almost surely, 2^20755475 is an apocalyptic number.

20755475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20755475 is a deficient number, since it is larger than the sum of its proper divisors (6961501).

20755475 is a wasteful number, since it uses less digits than its factorization.

20755475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63886 (or 63881 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 20755475 is about 4555.8177092592. The cubic root of 20755475 is about 274.8173994409.

Adding to 20755475 its product of nonzero digits (49000), we get a triangular number (20804475 = T₆₄₅₀).

The spelling of 20755475 in words is "twenty million, seven hundred fifty-five thousand, four hundred seventy-five".