20474757 has 12 divisors (see below), whose sum is σ = 29635840. Its totient is φ = 13621608.

The previous prime is 20474747. The next prime is 20474759. The reversal of 20474757 is 75747402.

It is a happy number.

It is not a de Polignac number, because 20474757 - 2⁶ = 20474693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474759) 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, 2844 + ... + 7002.

Almost surely, 2^20474757 is an apocalyptic number.

It is an amenable number.

20474757 is a deficient number, since it is larger than the sum of its proper divisors (9161083).

20474757 is a wasteful number, since it uses less digits than its factorization.

20474757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712 (or 4709 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 20474757 is about 4524.9040873813. The cubic root of 20474757 is about 273.5728020697.

The spelling of 20474757 in words is "twenty million, four hundred seventy-four thousand, seven hundred fifty-seven".