20622793 has 2 divisors, whose sum is σ = 20622794. Its totient is φ = 20622792.

The previous prime is 20622787. The next prime is 20622803. The reversal of 20622793 is 39722602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10969344 + 9653449 = 3312^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20622793 is a prime.

It is a super-2 number, since 2×20622793² = 850599182241698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20622773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10311396 + 10311397.

It is an arithmetic number, because the mean of its divisors is an integer number (10311397).

Almost surely, 2^20622793 is an apocalyptic number.

It is an amenable number.

20622793 is a deficient number, since it is larger than the sum of its proper divisors (1).

20622793 is an equidigital number, since it uses as much as digits as its factorization.

20622793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20622793 is about 4541.2325419428. The cubic root of 20622793 is about 274.2305454803.

The spelling of 20622793 in words is "twenty million, six hundred twenty-two thousand, seven hundred ninety-three".