20892149 has 2 divisors, whose sum is σ = 20892150. Its totient is φ = 20892148.

The previous prime is 20892143. The next prime is 20892163. The reversal of 20892149 is 94129802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 552049 = 4510^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 20892149 - 2¹⁶ = 20826613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20892143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446074 + 10446075.

It is an arithmetic number, because the mean of its divisors is an integer number (10446075).

Almost surely, 2^20892149 is an apocalyptic number.

It is an amenable number.

20892149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20892149 is an equidigital number, since it uses as much as digits as its factorization.

20892149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 20892149 is about 4570.7930384125. The cubic root of 20892149 is about 275.4193008502.

The spelling of 20892149 in words is "twenty million, eight hundred ninety-two thousand, one hundred forty-nine".