20930461 has 2 divisors, whose sum is σ = 20930462. Its totient is φ = 20930460.

The previous prime is 20930453. The next prime is 20930467. The reversal of 20930461 is 16403902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 2910436 = 4245^2 + 1706^2 .

It is a cyclic number.

It is not a de Polignac number, because 20930461 - 2³ = 20930453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20930467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10465230 + 10465231.

It is an arithmetic number, because the mean of its divisors is an integer number (10465231).

Almost surely, 2^20930461 is an apocalyptic number.

It is an amenable number.

20930461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20930461 is an equidigital number, since it uses as much as digits as its factorization.

20930461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20930461 is about 4574.9820764676. The cubic root of 20930461 is about 275.5875525831.

The spelling of 20930461 in words is "twenty million, nine hundred thirty thousand, four hundred sixty-one".