20691260046 has 24 divisors (see below), whose sum is σ = 46780241040. Its totient is φ = 6597213216.

The previous prime is 20691260041. The next prime is 20691260047. The reversal of 20691260046 is 64006219602.

20691260046 is a `hidden beast` number, since 2 + 0 + 6 + 9 + 1 + 2 + 600 + 46 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20691260041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24989031 + ... + 24989858.

It is an arithmetic number, because the mean of its divisors is an integer number (1949176710).

Almost surely, 2^20691260046 is an apocalyptic number.

20691260046 is an abundant number, since it is smaller than the sum of its proper divisors (26088980994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20691260046 is a wasteful number, since it uses less digits than its factorization.

20691260046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49978920 (or 49978917 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 20691260046 its reverse (64006219602), we get a palindrome (84697479648).

The spelling of 20691260046 in words is "twenty billion, six hundred ninety-one million, two hundred sixty thousand, forty-six".