19538610490 has 64 divisors (see below), whose sum is σ = 41068228608. Its totient is φ = 6554361600.

The previous prime is 19538610473. The next prime is 19538610491. The reversal of 19538610490 is 9401683591.

It is a self number, because there is not a number n which added to its sum of digits gives 19538610490.

It is not an unprimeable number, because it can be changed into a prime (19538610491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 803592 + ... + 827548.

It is an arithmetic number, because the mean of its divisors is an integer number (641691072).

Almost surely, 2^19538610490 is an apocalyptic number.

19538610490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19538610490 is an abundant number, since it is smaller than the sum of its proper divisors (21529618118).

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

19538610490 is a wasteful number, since it uses less digits than its factorization.

19538610490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24223.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 19538610490 in words is "nineteen billion, five hundred thirty-eight million, six hundred ten thousand, four hundred ninety".