19614749940 has 384 divisors, whose sum is σ = 68714956800. Its totient is φ = 4615833600.

The previous prime is 19614749881. The next prime is 19614749969. The reversal of 19614749940 is 4994741691.

19614749940 is a `hidden beast` number, since 1 + 9 + 6 + 147 + 499 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18662415 + ... + 18663465.

It is an arithmetic number, because the mean of its divisors is an integer number (178945200).

Almost surely, 2^19614749940 is an apocalyptic number.

19614749940 is a gapful number since it is divisible by the number (10) 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 19614749940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34357478400).

19614749940 is an abundant number, since it is smaller than the sum of its proper divisors (49100206860).

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

19614749940 is a wasteful number, since it uses less digits than its factorization.

19614749940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 19614749940 in words is "nineteen billion, six hundred fourteen million, seven hundred forty-nine thousand, nine hundred forty".