20457022 has 4 divisors (see below), whose sum is σ = 30685536. Its totient is φ = 10228510.

The previous prime is 20456987. The next prime is 20457023. The reversal of 20457022 is 22075402.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20456984 and 20457002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5114254 + ... + 5114257.

It is an arithmetic number, because the mean of its divisors is an integer number (7671384).

Almost surely, 2^20457022 is an apocalyptic number.

20457022 is a deficient number, since it is larger than the sum of its proper divisors (10228514).

20457022 is a wasteful number, since it uses less digits than its factorization.

20457022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228513.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20457022 is about 4522.9439527812. The cubic root of 20457022 is about 273.4937907098.

The spelling of 20457022 in words is "twenty million, four hundred fifty-seven thousand, twenty-two".