20401542646 has 8 divisors (see below), whose sum is σ = 30603012120. Its totient is φ = 10200538608.

The previous prime is 20401542643. The next prime is 20401542697. The reversal of 20401542646 is 64624510402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401542643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30090 + ... + 204226.

It is an arithmetic number, because the mean of its divisors is an integer number (3825376515).

Almost surely, 2^20401542646 is an apocalyptic number.

20401542646 is a deficient number, since it is larger than the sum of its proper divisors (10201469474).

20401542646 is a wasteful number, since it uses less digits than its factorization.

20401542646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232718.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 20401542646 in words is "twenty billion, four hundred one million, five hundred forty-two thousand, six hundred forty-six".