16620405834 has 8 divisors (see below), whose sum is σ = 33240811680. Its totient is φ = 5540135276.

The previous prime is 16620405829. The next prime is 16620405859. The reversal of 16620405834 is 43850402661.

It is a sphenic number, since it is the product of 3 distinct primes.

16620405834 is an admirable number.

It is a super-2 number, since 2×16620405834² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16620405792 and 16620405801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385033814 + ... + 1385033825.

It is an arithmetic number, because the mean of its divisors is an integer number (4155101460).

Almost surely, 2^16620405834 is an apocalyptic number.

16620405834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16620405834 is a wasteful number, since it uses less digits than its factorization.

16620405834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770067644.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 16620405834 in words is "sixteen billion, six hundred twenty million, four hundred five thousand, eight hundred thirty-four".