20605863495 has 32 divisors (see below), whose sum is σ = 37685749248. Its totient is φ = 9418209408.

The previous prime is 20605863491. The next prime is 20605863511. The reversal of 20605863495 is 59436850602.

It is not a de Polignac number, because 20605863495 - 2² = 20605863491 is a prime.

It is a super-2 number, since 2×20605863495² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605863491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776232 + ... + 802338.

It is an arithmetic number, because the mean of its divisors is an integer number (1177679664).

Almost surely, 2^20605863495 is an apocalyptic number.

20605863495 is a deficient number, since it is larger than the sum of its proper divisors (17079885753).

20605863495 is a wasteful number, since it uses less digits than its factorization.

20605863495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33639.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 20605863495 in words is "twenty billion, six hundred five million, eight hundred sixty-three thousand, four hundred ninety-five".