20597131492616 has 64 divisors (see below), whose sum is σ = 45574476180480. Its totient is φ = 8539963914240.

The previous prime is 20597131492607. The next prime is 20597131492621. The reversal of 20597131492616 is 61629413179502.

It is a super-2 number, since 2×20597131492616² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 3832736 + ... + 7475568.

It is an arithmetic number, because the mean of its divisors is an integer number (712101190320).

Almost surely, 2^{20597131492616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20597131492616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22787238090240).

20597131492616 is an abundant number, since it is smaller than the sum of its proper divisors (24977344687864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20597131492616 is a wasteful number, since it uses less digits than its factorization.

20597131492616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646134 (or 3646130 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 20597131492616 in words is "twenty trillion, five hundred ninety-seven billion, one hundred thirty-one million, four hundred ninety-two thousand, six hundred sixteen".