19701411840 has 832 divisors, whose sum is σ = 79262668800. Its totient is φ = 4600627200.

The previous prime is 19701411817. The next prime is 19701411857. The reversal of 19701411840 is 4811410791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19701411795 and 19701411804.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 249384921 + ... + 249384999.

Almost surely, 2^19701411840 is an apocalyptic number.

19701411840 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 19701411840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39631334400).

19701411840 is an abundant number, since it is smaller than the sum of its proper divisors (59561256960).

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

19701411840 is a wasteful number, since it uses less digits than its factorization.

19701411840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 19701411840 in words is "nineteen billion, seven hundred one million, four hundred eleven thousand, eight hundred forty".