19697153040 has 60 divisors (see below), whose sum is σ = 66149608044. Its totient is φ = 5252573952.

The previous prime is 19697153039. The next prime is 19697153081. The reversal of 19697153040 is 4035179691.

19697153040 is a `hidden beast` number, since 1 + 9 + 6 + 9 + 71 + 530 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7487787024 + 12209366016 = 86532^2 + 110496^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13677859 + ... + 13679298.

Almost surely, 2^19697153040 is an apocalyptic number.

19697153040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19697153040 is an abundant number, since it is smaller than the sum of its proper divisors (46452455004).

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

19697153040 is a wasteful number, since it uses less digits than its factorization.

19697153040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27357176 (or 27357167 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 19697153040 in words is "nineteen billion, six hundred ninety-seven million, one hundred fifty-three thousand, forty".