19442942680 has 32 divisors (see below), whose sum is σ = 49996139040. Its totient is φ = 6666151680.

The previous prime is 19442942677. The next prime is 19442942681. The reversal of 19442942680 is 8624924491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442942681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34719261 + ... + 34719820.

It is an arithmetic number, because the mean of its divisors is an integer number (1562379345).

Almost surely, 2^19442942680 is an apocalyptic number.

19442942680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19442942680 is an abundant number, since it is smaller than the sum of its proper divisors (30553196360).

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

19442942680 is a wasteful number, since it uses less digits than its factorization.

19442942680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69439099 (or 69439095 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 19442942680 in words is "nineteen billion, four hundred forty-two million, nine hundred forty-two thousand, six hundred eighty".