84011020400 has 60 divisors (see below), whose sum is σ = 205257491400. Its totient is φ = 33034832640.

The previous prime is 84011020397. The next prime is 84011020433. The reversal of 84011020400 is 402011048.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1756295 + ... + 1803494.

It is an arithmetic number, because the mean of its divisors is an integer number (3420958190).

Almost surely, 2^84011020400 is an apocalyptic number.

84011020400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84011020400 is an abundant number, since it is smaller than the sum of its proper divisors (121246471000).

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

84011020400 is a wasteful number, since it uses less digits than its factorization.

84011020400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559866 (or 3559855 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 84011020400 its reverse (402011048), we get a palindrome (84413031448).

The spelling of 84011020400 in words is "eighty-four billion, eleven million, twenty thousand, four hundred".