20865456802 has 8 divisors (see below), whose sum is σ = 32658975936. Its totient is φ = 9979131492.

The previous prime is 20865456791. The next prime is 20865456823.

20865456802 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×20865456802² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 453596887 = 20865456802 / (2 + 0 + 8 + 6 + 5 + 4 + 5 + 6 + 8 + 0 + 2).

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 3 ways as a sum of consecutive naturals, for example, 226798398 + ... + 226798489.

It is an arithmetic number, because the mean of its divisors is an integer number (4082371992).

Almost surely, 2^20865456802 is an apocalyptic number.

20865456802 is a deficient number, since it is larger than the sum of its proper divisors (11793519134).

20865456802 is a wasteful number, since it uses less digits than its factorization.

20865456802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453596912.

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 20865456802 in words is "twenty billion, eight hundred sixty-five million, four hundred fifty-six thousand, eight hundred two".