20864669045 has 8 divisors (see below), whose sum is σ = 27313748640. Its totient is φ = 15174304720.

The previous prime is 20864669027. The next prime is 20864669099. The reversal of 20864669045 is 54096646802.

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

It is not a de Polignac number, because 20864669045 - 2¹² = 20864664949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20864668984 and 20864669002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189678755 + ... + 189678864.

It is an arithmetic number, because the mean of its divisors is an integer number (3414218580).

Almost surely, 2^20864669045 is an apocalyptic number.

It is an amenable number.

20864669045 is a deficient number, since it is larger than the sum of its proper divisors (6449079595).

20864669045 is a wasteful number, since it uses less digits than its factorization.

20864669045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379357635.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 20864669045 in words is "twenty billion, eight hundred sixty-four million, six hundred sixty-nine thousand, forty-five".