20994053 has 2 divisors, whose sum is σ = 20994054. Its totient is φ = 20994052.

The previous prime is 20994047. The next prime is 20994079. The reversal of 20994053 is 35049902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 2184484 = 4337^2 + 1478^2 .

It is a cyclic number.

It is not a de Polignac number, because 20994053 - 2¹² = 20989957 is a prime.

It is a super-2 number, since 2×20994053² = 881500522733618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20994023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497026 + 10497027.

It is an arithmetic number, because the mean of its divisors is an integer number (10497027).

Almost surely, 2^20994053 is an apocalyptic number.

It is an amenable number.

20994053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994053 is an equidigital number, since it uses as much as digits as its factorization.

20994053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20994053 is about 4581.9267781142. The cubic root of 20994053 is about 275.8663718109.

The spelling of 20994053 in words is "twenty million, nine hundred ninety-four thousand, fifty-three".