20954933 has 2 divisors, whose sum is σ = 20954934. Its totient is φ = 20954932.

The previous prime is 20954911. The next prime is 20954939. The reversal of 20954933 is 33945902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13126129 + 7828804 = 3623^2 + 2798^2 .

It is a cyclic number.

It is not a de Polignac number, because 20954933 - 2¹² = 20950837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20954893 and 20954902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20954939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477466 + 10477467.

It is an arithmetic number, because the mean of its divisors is an integer number (10477467).

Almost surely, 2^20954933 is an apocalyptic number.

It is an amenable number.

20954933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20954933 is an equidigital number, since it uses as much as digits as its factorization.

20954933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 20954933 is about 4577.6558411484. The cubic root of 20954933 is about 275.6949168666.

The spelling of 20954933 in words is "twenty million, nine hundred fifty-four thousand, nine hundred thirty-three".