20642626 has 8 divisors (see below), whose sum is σ = 32593680. Its totient is φ = 9778068.

The previous prime is 20642603. The next prime is 20642627. The reversal of 20642626 is 62624602.

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

It is a super-2 number, since 2×20642626² = 852236016351752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20642594 and 20642603.

It is not an unprimeable number, because it can be changed into a prime (20642627) 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, 271576 + ... + 271651.

It is an arithmetic number, because the mean of its divisors is an integer number (4074210).

Almost surely, 2^20642626 is an apocalyptic number.

20642626 is a deficient number, since it is larger than the sum of its proper divisors (11951054).

20642626 is a wasteful number, since it uses less digits than its factorization.

20642626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543248.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20642626 is about 4543.4156754583. The cubic root of 20642626 is about 274.3184267521.

The spelling of 20642626 in words is "twenty million, six hundred forty-two thousand, six hundred twenty-six".