19490624540 has 48 divisors (see below), whose sum is σ = 41113293984. Its totient is φ = 7761465600.

The previous prime is 19490624537. The next prime is 19490624599. The reversal of 19490624540 is 4542609491.

It is a junction number, because it is equal to n+sod(n) for n = 19490624491 and 19490624500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6471635 + ... + 6474645.

It is an arithmetic number, because the mean of its divisors is an integer number (856526958).

Almost surely, 2^19490624540 is an apocalyptic number.

19490624540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19490624540 is an abundant number, since it is smaller than the sum of its proper divisors (21622669444).

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

19490624540 is a wasteful number, since it uses less digits than its factorization.

19490624540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 19490624540 in words is "nineteen billion, four hundred ninety million, six hundred twenty-four thousand, five hundred forty".