19740357940 has 48 divisors (see below), whose sum is σ = 42822743040. Its totient is φ = 7635939840.

The previous prime is 19740357937. The next prime is 19740357941. The reversal of 19740357940 is 4975304791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19740357941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912489 + ... + 933871.

It is an arithmetic number, because the mean of its divisors is an integer number (892140480).

Almost surely, 2^19740357940 is an apocalyptic number.

19740357940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19740357940 is an abundant number, since it is smaller than the sum of its proper divisors (23082385100).

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

19740357940 is a wasteful number, since it uses less digits than its factorization.

19740357940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22912 (or 22910 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 19740357940 in words is "nineteen billion, seven hundred forty million, three hundred fifty-seven thousand, nine hundred forty".