20495475 has 162 divisors, whose sum is σ = 50444316. Its totient is φ = 7862400.

The previous prime is 20495473. The next prime is 20495491. The reversal of 20495475 is 57459402.

It is not a de Polignac number, because 20495475 - 2¹ = 20495473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20495473) by changing a digit.

It is a polite number, since it can be written in 161 ways as a sum of consecutive naturals, for example, 1576569 + ... + 1576581.

Almost surely, 2^20495475 is an apocalyptic number.

20495475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20495475 is an abundant number, since it is smaller than the sum of its proper divisors (29948841).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20495475 is a wasteful number, since it uses less digits than its factorization.

20495475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20495475 is about 4527.1928388351. The cubic root of 20495475 is about 273.6650452588.

The spelling of 20495475 in words is "twenty million, four hundred ninety-five thousand, four hundred seventy-five".