20940892997 has 8 divisors (see below), whose sum is σ = 22638804000. Its totient is φ = 19302557904.

The previous prime is 20940892993. The next prime is 20940893009. The reversal of 20940892997 is 79929804902.

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

It is a cyclic number.

It is not a de Polignac number, because 20940892997 - 2² = 20940892993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20940892993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14893247 + ... + 14894652.

It is an arithmetic number, because the mean of its divisors is an integer number (2829850500).

Almost surely, 2^20940892997 is an apocalyptic number.

It is an amenable number.

20940892997 is a deficient number, since it is larger than the sum of its proper divisors (1697911003).

20940892997 is a wasteful number, since it uses less digits than its factorization.

20940892997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29787955.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 20940892997 in words is "twenty billion, nine hundred forty million, eight hundred ninety-two thousand, nine hundred ninety-seven".