20925019 has 2 divisors, whose sum is σ = 20925020. Its totient is φ = 20925018.

The previous prime is 20924987. The next prime is 20925029. The reversal of 20925019 is 91052902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20925019 - 2⁵ = 20924987 is a prime.

It is a super-2 number, since 2×20925019² = 875712840300722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20925029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10462509 + 10462510.

It is an arithmetic number, because the mean of its divisors is an integer number (10462510).

Almost surely, 2^20925019 is an apocalyptic number.

20925019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925019 is an equidigital number, since it uses as much as digits as its factorization.

20925019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20925019 is about 4574.3872813744. The cubic root of 20925019 is about 275.5636659065.

The spelling of 20925019 in words is "twenty million, nine hundred twenty-five thousand, nineteen".