21016151707 has 4 divisors (see below), whose sum is σ = 21016886680. Its totient is φ = 21015416736.

The previous prime is 21016151669. The next prime is 21016151711. The reversal of 21016151707 is 70715161012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21016151707 - 2¹¹ = 21016149659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21016151777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322782 + ... + 382387.

It is an arithmetic number, because the mean of its divisors is an integer number (5254221670).

Almost surely, 2^21016151707 is an apocalyptic number.

21016151707 is a deficient number, since it is larger than the sum of its proper divisors (734973).

21016151707 is an equidigital number, since it uses as much as digits as its factorization.

21016151707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734972.

The product of its (nonzero) digits is 2940, while the sum is 31.

The spelling of 21016151707 in words is "twenty-one billion, sixteen million, one hundred fifty-one thousand, seven hundred seven".