19840473900 has 432 divisors, whose sum is σ = 74012387904. Its totient is φ = 4395663360.

The previous prime is 19840473899. The next prime is 19840473901. The reversal of 19840473900 is 937404891.

19840473900 is a `hidden beast` number, since 1 + 98 + 4 + 0 + 473 + 90 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19840473899) and next prime (19840473901).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19840473901) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4572532 + ... + 4576868.

It is an arithmetic number, because the mean of its divisors is an integer number (171324972).

Almost surely, 2^19840473900 is an apocalyptic number.

19840473900 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 19840473900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37006193952).

19840473900 is an abundant number, since it is smaller than the sum of its proper divisors (54171914004).

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

19840473900 is a wasteful number, since it uses less digits than its factorization.

19840473900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410 (or 4400 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 19840473900 in words is "nineteen billion, eight hundred forty million, four hundred seventy-three thousand, nine hundred".