20615853742 has 32 divisors (see below), whose sum is σ = 34659394560. Its totient is φ = 9116467680.

The previous prime is 20615853733. The next prime is 20615853751. The reversal of 20615853742 is 24735851602.

It is an interprime number because it is at equal distance from previous prime (20615853733) and next prime (20615853751).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112984 + ... + 232372.

It is an arithmetic number, because the mean of its divisors is an integer number (1083106080).

Almost surely, 2^20615853742 is an apocalyptic number.

20615853742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20615853742 is a deficient number, since it is larger than the sum of its proper divisors (14043540818).

20615853742 is a wasteful number, since it uses less digits than its factorization.

20615853742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119616.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 20615853742 in words is "twenty billion, six hundred fifteen million, eight hundred fifty-three thousand, seven hundred forty-two".