20941511 has 2 divisors, whose sum is σ = 20941512. Its totient is φ = 20941510.

The previous prime is 20941493. The next prime is 20941537. The reversal of 20941511 is 11514902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20941511 - 2²² = 16747207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20943511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10470755 + 10470756.

It is an arithmetic number, because the mean of its divisors is an integer number (10470756).

Almost surely, 2^20941511 is an apocalyptic number.

20941511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20941511 is an equidigital number, since it uses as much as digits as its factorization.

20941511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 20941511 is about 4576.1895721222. The cubic root of 20941511 is about 275.6360418274.

The spelling of 20941511 in words is "twenty million, nine hundred forty-one thousand, five hundred eleven".