16621920341 has 16 divisors (see below), whose sum is σ = 18376674624. Its totient is φ = 14937519744.

The previous prime is 16621920311. The next prime is 16621920377. The reversal of 16621920341 is 14302912661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16621920341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16621920311) 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, 123185 + ... + 220041.

It is an arithmetic number, because the mean of its divisors is an integer number (1148542164).

Almost surely, 2^16621920341 is an apocalyptic number.

It is an amenable number.

16621920341 is a deficient number, since it is larger than the sum of its proper divisors (1754754283).

16621920341 is a wasteful number, since it uses less digits than its factorization.

16621920341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97220.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 16621920341 in words is "sixteen billion, six hundred twenty-one million, nine hundred twenty thousand, three hundred forty-one".