20489348497 has 16 divisors (see below), whose sum is σ = 22513518720. Its totient is φ = 18560361600.

The previous prime is 20489348491. The next prime is 20489348519. The reversal of 20489348497 is 79484398402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20489348497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20489348491) 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, 1540797 + ... + 1554037.

It is an arithmetic number, because the mean of its divisors is an integer number (1407094920).

Almost surely, 2^20489348497 is an apocalyptic number.

It is an amenable number.

20489348497 is a deficient number, since it is larger than the sum of its proper divisors (2024170223).

20489348497 is a wasteful number, since it uses less digits than its factorization.

20489348497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16824.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 20489348497 in words is "twenty billion, four hundred eighty-nine million, three hundred forty-eight thousand, four hundred ninety-seven".