20994713 has 2 divisors, whose sum is σ = 20994714. Its totient is φ = 20994712.

The previous prime is 20994709. The next prime is 20994749. The reversal of 20994713 is 31749902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 2778889 = 4268^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 20994713 - 2² = 20994709 is a prime.

It is not a weakly prime, because it can be changed into another prime (20994703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497356 + 10497357.

It is an arithmetic number, because the mean of its divisors is an integer number (10497357).

Almost surely, 2^20994713 is an apocalyptic number.

It is an amenable number.

20994713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994713 is an equidigital number, since it uses as much as digits as its factorization.

20994713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20994713 is about 4581.9987996507. The cubic root of 20994713 is about 275.8692626280.

The spelling of 20994713 in words is "twenty million, nine hundred ninety-four thousand, seven hundred thirteen".