20492071 has 2 divisors, whose sum is σ = 20492072. Its totient is φ = 20492070.

The previous prime is 20492063. The next prime is 20492077. The reversal of 20492071 is 17029402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20492071 - 2³ = 20492063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20492077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10246035 + 10246036.

It is an arithmetic number, because the mean of its divisors is an integer number (10246036).

Almost surely, 2^20492071 is an apocalyptic number.

20492071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20492071 is an equidigital number, since it uses as much as digits as its factorization.

20492071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20492071 is about 4526.8168728147. The cubic root of 20492071 is about 273.6498938268.

The spelling of 20492071 in words is "twenty million, four hundred ninety-two thousand, seventy-one".