20668445715 has 8 divisors (see below), whose sum is σ = 33069513168. Its totient is φ = 11023171040.

The previous prime is 20668445627. The next prime is 20668445737. The reversal of 20668445715 is 51754486602.

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

It is not a de Polignac number, because 20668445715 - 2¹⁷ = 20668314643 is a prime.

It is a super-2 number, since 2×20668445715² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688948176 + ... + 688948205.

It is an arithmetic number, because the mean of its divisors is an integer number (4133689146).

Almost surely, 2^20668445715 is an apocalyptic number.

20668445715 is a deficient number, since it is larger than the sum of its proper divisors (12401067453).

20668445715 is a wasteful number, since it uses less digits than its factorization.

20668445715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377896389.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 20668445715 in words is "twenty billion, six hundred sixty-eight million, four hundred forty-five thousand, seven hundred fifteen".