19957106228720 has 40 divisors (see below), whose sum is σ = 46635806394144. Its totient is φ = 7942320442112.

The previous prime is 19957106228687. The next prime is 19957106228753. The reversal of 19957106228720 is 2782260175991.

It is an interprime number because it is at equal distance from previous prime (19957106228687) and next prime (19957106228753).

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 19957106228720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633141164 + ... + 633172683.

Almost surely, 2^{19957106228720} is an apocalyptic number.

19957106228720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19957106228720 is an abundant number, since it is smaller than the sum of its proper divisors (26678700165424).

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

19957106228720 is a wasteful number, since it uses less digits than its factorization.

19957106228720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266314057 (or 1266314051 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 19957106228720 in words is "nineteen trillion, nine hundred fifty-seven billion, one hundred six million, two hundred twenty-eight thousand, seven hundred twenty".