34002865821 has 16 divisors (see below), whose sum is σ = 45757422144. Its totient is φ = 22458610944.

The previous prime is 34002865789. The next prime is 34002865849. The reversal of 34002865821 is 12856820043.

It is not a de Polignac number, because 34002865821 - 2⁵ = 34002865789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34002865821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34002865021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847210 + ... + 886436.

It is an arithmetic number, because the mean of its divisors is an integer number (2859838884).

Almost surely, 2^34002865821 is an apocalyptic number.

It is an amenable number.

34002865821 is a deficient number, since it is larger than the sum of its proper divisors (11754556323).

34002865821 is a wasteful number, since it uses less digits than its factorization.

34002865821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41900.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 34002865821 in words is "thirty-four billion, two million, eight hundred sixty-five thousand, eight hundred twenty-one".