20340852646 has 4 divisors (see below), whose sum is σ = 30511278972. Its totient is φ = 10170426322.

The previous prime is 20340852617. The next prime is 20340852673. The reversal of 20340852646 is 64625804302.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20340852599 and 20340852608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5085213160 + ... + 5085213163.

It is an arithmetic number, because the mean of its divisors is an integer number (7627819743).

Almost surely, 2^20340852646 is an apocalyptic number.

20340852646 is a deficient number, since it is larger than the sum of its proper divisors (10170426326).

20340852646 is a wasteful number, since it uses less digits than its factorization.

20340852646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170426325.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 20340852646 in words is "twenty billion, three hundred forty million, eight hundred fifty-two thousand, six hundred forty-six".