19972690394736 has 120 divisors (see below), whose sum is σ = 52531640688384. Its totient is φ = 6538612254720.

The previous prime is 19972690394729. The next prime is 19972690394743. The reversal of 19972690394736 is 63749309627991.

It is an interprime number because it is at equal distance from previous prime (19972690394729) and next prime (19972690394743).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58995001 + ... + 59332583.

Almost surely, 2^{19972690394736} is an apocalyptic number.

19972690394736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19972690394736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26265820344192).

19972690394736 is an abundant number, since it is smaller than the sum of its proper divisors (32558950293648).

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

19972690394736 is a wasteful number, since it uses less digits than its factorization.

19972690394736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337919 (or 337816 counting only the distinct ones).

The product of its (nonzero) digits is 833299488, while the sum is 75.

The spelling of 19972690394736 in words is "nineteen trillion, nine hundred seventy-two billion, six hundred ninety million, three hundred ninety-four thousand, seven hundred thirty-six".