20436722 has 8 divisors (see below), whose sum is σ = 30691200. Its totient is φ = 10206324.

The previous prime is 20436721. The next prime is 20436733. The reversal of 20436722 is 22763402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20436722² = 835319212210568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20436691 and 20436700.

It is not an unprimeable number, because it can be changed into a prime (20436721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3722 + ... + 7397.

It is an arithmetic number, because the mean of its divisors is an integer number (3836400).

Almost surely, 2^20436722 is an apocalyptic number.

20436722 is a deficient number, since it is larger than the sum of its proper divisors (10254478).

20436722 is a wasteful number, since it uses less digits than its factorization.

20436722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12040.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20436722 is about 4520.6992821908. The cubic root of 20436722 is about 273.4032959252.

The spelling of 20436722 in words is "twenty million, four hundred thirty-six thousand, seven hundred twenty-two".