20866673967 has 16 divisors (see below), whose sum is σ = 27975026688. Its totient is φ = 13834844640.

The previous prime is 20866673951. The next prime is 20866673983. The reversal of 20866673967 is 76937666802.

It is an interprime number because it is at equal distance from previous prime (20866673951) and next prime (20866673983).

It is not a de Polignac number, because 20866673967 - 2⁴ = 20866673951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20866673967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20866673917) 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, 674613 + ... + 704865.

It is an arithmetic number, because the mean of its divisors is an integer number (1748439168).

Almost surely, 2^20866673967 is an apocalyptic number.

20866673967 is a deficient number, since it is larger than the sum of its proper divisors (7108352721).

20866673967 is a wasteful number, since it uses less digits than its factorization.

20866673967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31510.

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 20866673967 in words is "twenty billion, eight hundred sixty-six million, six hundred seventy-three thousand, nine hundred sixty-seven".