20699672678 has 8 divisors (see below), whose sum is σ = 31178345880. Its totient is φ = 10306890720.

The previous prime is 20699672659. The next prime is 20699672689. The reversal of 20699672678 is 87627699602.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20699672678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21472208 + ... + 21473171.

It is an arithmetic number, because the mean of its divisors is an integer number (3897293235).

Almost surely, 2^20699672678 is an apocalyptic number.

20699672678 is a deficient number, since it is larger than the sum of its proper divisors (10478673202).

20699672678 is a wasteful number, since it uses less digits than its factorization.

20699672678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42945622.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 20699672678 in words is "twenty billion, six hundred ninety-nine million, six hundred seventy-two thousand, six hundred seventy-eight".