34857967821 has 16 divisors (see below), whose sum is σ = 47550854400. Its totient is φ = 22707929088.

The previous prime is 34857967813. The next prime is 34857967847. The reversal of 34857967821 is 12876975843.

It is not a de Polignac number, because 34857967821 - 2³ = 34857967813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34857917821) 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, 735156 + ... + 781133.

It is an arithmetic number, because the mean of its divisors is an integer number (2971928400).

Almost surely, 2^34857967821 is an apocalyptic number.

It is an amenable number.

34857967821 is a deficient number, since it is larger than the sum of its proper divisors (12692886579).

34857967821 is a wasteful number, since it uses less digits than its factorization.

34857967821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516468.

The product of its digits is 20321280, while the sum is 60.

The spelling of 34857967821 in words is "thirty-four billion, eight hundred fifty-seven million, nine hundred sixty-seven thousand, eight hundred twenty-one".