16701702021 has 6 divisors (see below), whose sum is σ = 24124680710. Its totient is φ = 11134468008.

The previous prime is 16701702001. The next prime is 16701702023. The reversal of 16701702021 is 12020710761.

It can be written as a sum of positive squares in only one way, i.e., 13522433796 + 3179268225 = 116286^2 + 56385^2 .

It is not a de Polignac number, because 16701702021 - 2¹³ = 16701693829 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 (16701702023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 927872326 + ... + 927872343.

Almost surely, 2^16701702021 is an apocalyptic number.

It is an amenable number.

16701702021 is a deficient number, since it is larger than the sum of its proper divisors (7422978689).

16701702021 is a wasteful number, since it uses less digits than its factorization.

16701702021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855744675 (or 1855744672 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The spelling of 16701702021 in words is "sixteen billion, seven hundred one million, seven hundred two thousand, twenty-one".