20455474 has 32 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 8899200.

The previous prime is 20455459. The next prime is 20455483. The reversal of 20455474 is 47455402.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32737 + ... + 33355.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^20455474 is an apocalyptic number.

20455474 is a deficient number, since it is larger than the sum of its proper divisors (14542286).

20455474 is a wasteful number, since it uses less digits than its factorization.

20455474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 20455474 is about 4522.7728220639. The cubic root of 20455474 is about 273.4868920343.

The spelling of 20455474 in words is "twenty million, four hundred fifty-five thousand, four hundred seventy-four".