19701323400 has 192 divisors, whose sum is σ = 68427852480. Its totient is φ = 4646937600.

The previous prime is 19701323393. The next prime is 19701323441. The reversal of 19701323400 is 432310791.

It is a super-2 number, since 2×19701323400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203862 + ... + 284538.

It is an arithmetic number, because the mean of its divisors is an integer number (356395065).

Almost surely, 2^19701323400 is an apocalyptic number.

19701323400 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 19701323400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34213926240).

19701323400 is an abundant number, since it is smaller than the sum of its proper divisors (48726529080).

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

19701323400 is a wasteful number, since it uses less digits than its factorization.

19701323400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80744 (or 80735 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The spelling of 19701323400 in words is "nineteen billion, seven hundred one million, three hundred twenty-three thousand, four hundred".