84821894807 has 24 divisors (see below), whose sum is σ = 96760722960. Its totient is φ = 74116373760.

The previous prime is 84821894771. The next prime is 84821894821. The reversal of 84821894807 is 70849812848.

It is not a de Polignac number, because 84821894807 - 2¹⁸ = 84821632663 is a prime.

It is a super-3 number, since 3×84821894807³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84821894827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4231733 + ... + 4251729.

It is an arithmetic number, because the mean of its divisors is an integer number (4031696790).

Almost surely, 2^84821894807 is an apocalyptic number.

84821894807 is a deficient number, since it is larger than the sum of its proper divisors (11938828153).

84821894807 is a wasteful number, since it uses less digits than its factorization.

84821894807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21363 (or 21350 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 59.

The spelling of 84821894807 in words is "eighty-four billion, eight hundred twenty-one million, eight hundred ninety-four thousand, eight hundred seven".