20864880494 has 8 divisors (see below), whose sum is σ = 31301450328. Its totient is φ = 10431063720.

The previous prime is 20864880467. The next prime is 20864880499. The reversal of 20864880494 is 49408846802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864880499) 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, 669212 + ... + 699695.

It is an arithmetic number, because the mean of its divisors is an integer number (3912681291).

Almost surely, 2^20864880494 is an apocalyptic number.

20864880494 is a deficient number, since it is larger than the sum of its proper divisors (10436569834).

20864880494 is a wasteful number, since it uses less digits than its factorization.

20864880494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376530.

The product of its (nonzero) digits is 3538944, while the sum is 53.

The spelling of 20864880494 in words is "twenty billion, eight hundred sixty-four million, eight hundred eighty thousand, four hundred ninety-four".