20946649835 has 8 divisors (see below), whose sum is σ = 25155640320. Its totient is φ = 16744212864.

The previous prime is 20946649831. The next prime is 20946649837. The reversal of 20946649835 is 53894664902.

It is a happy number.

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 20946649835 - 2² = 20946649831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20946649831) 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, 1631342 + ... + 1644131.

It is an arithmetic number, because the mean of its divisors is an integer number (3144455040).

Almost surely, 2^20946649835 is an apocalyptic number.

20946649835 is a deficient number, since it is larger than the sum of its proper divisors (4208990485).

20946649835 is a wasteful number, since it uses less digits than its factorization.

20946649835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276757.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 20946649835 in words is "twenty billion, nine hundred forty-six million, six hundred forty-nine thousand, eight hundred thirty-five".