20736475 has 12 divisors (see below), whose sum is σ = 25966096. Its totient is φ = 16426080.

The previous prime is 20736461. The next prime is 20736491. The reversal of 20736475 is 57463702.

It is a happy number.

It is not a de Polignac number, because 20736475 - 2⁷ = 20736347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20736475.

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, 1452 + ... + 6601.

Almost surely, 2^20736475 is an apocalyptic number.

20736475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20736475 is a deficient number, since it is larger than the sum of its proper divisors (5229621).

20736475 is a wasteful number, since it uses less digits than its factorization.

20736475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166 (or 8161 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20736475 is about 4553.7319859649. The cubic root of 20736475 is about 274.7335159563.

The spelling of 20736475 in words is "twenty million, seven hundred thirty-six thousand, four hundred seventy-five".