19690931400 has 384 divisors, whose sum is σ = 71459712000. Its totient is φ = 4392483840.

The previous prime is 19690931387. The next prime is 19690931431. The reversal of 19690931400 is 413909691.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 56746027 + ... + 56746373.

It is an arithmetic number, because the mean of its divisors is an integer number (186093000).

Almost surely, 2^19690931400 is an apocalyptic number.

19690931400 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 19690931400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35729856000).

19690931400 is an abundant number, since it is smaller than the sum of its proper divisors (51768780600).

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

19690931400 is a wasteful number, since it uses less digits than its factorization.

19690931400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 19690931400 in words is "nineteen billion, six hundred ninety million, nine hundred thirty-one thousand, four hundred".