20465112499 has 16 divisors (see below), whose sum is σ = 23367379392. Its totient is φ = 17755573248.

The previous prime is 20465112497. The next prime is 20465112509. The reversal of 20465112499 is 99421156402.

It is a cyclic number.

It is not a de Polignac number, because 20465112499 - 2¹ = 20465112497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20465112497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101887 + ... + 226519.

It is an arithmetic number, because the mean of its divisors is an integer number (1460461212).

Almost surely, 2^20465112499 is an apocalyptic number.

20465112499 is a deficient number, since it is larger than the sum of its proper divisors (2902266893).

20465112499 is a wasteful number, since it uses less digits than its factorization.

20465112499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125406.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 20465112499 in words is "twenty billion, four hundred sixty-five million, one hundred twelve thousand, four hundred ninety-nine".