20897472119 has 2 divisors, whose sum is σ = 20897472120. Its totient is φ = 20897472118.

The previous prime is 20897472109. The next prime is 20897472161. The reversal of 20897472119 is 91127479802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20897472119 - 2²⁸ = 20629036663 is a prime.

It is a super-2 number, since 2×20897472119² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20897472109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10448736059 + 10448736060.

It is an arithmetic number, because the mean of its divisors is an integer number (10448736060).

Almost surely, 2^20897472119 is an apocalyptic number.

20897472119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20897472119 is an equidigital number, since it uses as much as digits as its factorization.

20897472119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 20897472119 in words is "twenty billion, eight hundred ninety-seven million, four hundred seventy-two thousand, one hundred nineteen".