19535761940 has 24 divisors (see below), whose sum is σ = 41146850472. Its totient is φ = 7791114240.

The previous prime is 19535761909. The next prime is 19535761969. The reversal of 19535761940 is 4916753591.

It can be written as a sum of positive squares in 4 ways, for example, as 46485124 + 19489276816 = 6818^2 + 139604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1442501 + ... + 1455980.

It is an arithmetic number, because the mean of its divisors is an integer number (1714452103).

Almost surely, 2^19535761940 is an apocalyptic number.

19535761940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19535761940 is an abundant number, since it is smaller than the sum of its proper divisors (21611088532).

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

19535761940 is a wasteful number, since it uses less digits than its factorization.

19535761940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898827 (or 2898825 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 19535761940 in words is "nineteen billion, five hundred thirty-five million, seven hundred sixty-one thousand, nine hundred forty".