19457705040 has 160 divisors (see below), whose sum is σ = 62500571136. Its totient is φ = 5003550720.

The previous prime is 19457705027. The next prime is 19457705053. The reversal of 19457705040 is 4050775491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19457705027) and next prime (19457705053).

It is a junction number, because it is equal to n+sod(n) for n = 19457704983 and 19457705001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 993745 + ... + 1013135.

Almost surely, 2^19457705040 is an apocalyptic number.

19457705040 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 19457705040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31250285568).

19457705040 is an abundant number, since it is smaller than the sum of its proper divisors (43042866096).

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

19457705040 is a wasteful number, since it uses less digits than its factorization.

19457705040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19557 (or 19551 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 19457705040 in words is "nineteen billion, four hundred fifty-seven million, seven hundred five thousand, forty".