20422686 has 16 divisors (see below), whose sum is σ = 40988304. Its totient is φ = 6783744.

The previous prime is 20422669. The next prime is 20422691. The reversal of 20422686 is 68622402.

It is a super-2 number, since 2×20422686² = 834172206909192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051 + ... + 7566.

It is an arithmetic number, because the mean of its divisors is an integer number (2561769).

Almost surely, 2^20422686 is an apocalyptic number.

20422686 is an abundant number, since it is smaller than the sum of its proper divisors (20565618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422686 is a wasteful number, since it uses less digits than its factorization.

20422686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11915.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20422686 is about 4519.1466008529. The cubic root of 20422686 is about 273.3406901979.

The spelling of 20422686 in words is "twenty million, four hundred twenty-two thousand, six hundred eighty-six".