20926331 has 4 divisors (see below), whose sum is σ = 20945664. Its totient is φ = 20907000.

The previous prime is 20926319. The next prime is 20926369. The reversal of 20926331 is 13362902.

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

It is a cyclic number.

It is not a de Polignac number, because 20926331 - 2¹⁴ = 20909947 is a prime.

It is a super-2 number, since 2×20926331² = 875822658243122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20926331.

It is not an unprimeable number, because it can be changed into a prime (20926531) 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, 7940 + ... + 10241.

It is an arithmetic number, because the mean of its divisors is an integer number (5236416).

Almost surely, 2^20926331 is an apocalyptic number.

20926331 is a deficient number, since it is larger than the sum of its proper divisors (19333).

20926331 is a wasteful number, since it uses less digits than its factorization.

20926331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19332.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20926331 is about 4574.5306863109. The cubic root of 20926331 is about 275.5694250725.

The spelling of 20926331 in words is "twenty million, nine hundred twenty-six thousand, three hundred thirty-one".