20457520519 has 2 divisors, whose sum is σ = 20457520520. Its totient is φ = 20457520518.

The previous prime is 20457520507. The next prime is 20457520561. The reversal of 20457520519 is 91502575402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20457520519 - 2⁹ = 20457520007 is a prime.

It is a super-2 number, since 2×20457520519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20457520019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228760259 + 10228760260.

It is an arithmetic number, because the mean of its divisors is an integer number (10228760260).

Almost surely, 2^20457520519 is an apocalyptic number.

20457520519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20457520519 is an equidigital number, since it uses as much as digits as its factorization.

20457520519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 20457520519 in words is "twenty billion, four hundred fifty-seven million, five hundred twenty thousand, five hundred nineteen".