20204202646 has 8 divisors (see below), whose sum is σ = 30439812600. Its totient is φ = 10057598448.

The previous prime is 20204202587. The next prime is 20204202659. The reversal of 20204202646 is 64620240202.

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

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, 22250871 + ... + 22251778.

It is an arithmetic number, because the mean of its divisors is an integer number (3804976575).

Almost surely, 2^20204202646 is an apocalyptic number.

20204202646 is a deficient number, since it is larger than the sum of its proper divisors (10235609954).

20204202646 is a wasteful number, since it uses less digits than its factorization.

20204202646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44502878.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20204202646 its reverse (64620240202), we get a palindrome (84824442848).

It can be divided in two parts, 2020420 and 2646, that added together give a triangular number (2023066 = T₂₀₁₁).

The spelling of 20204202646 in words is "twenty billion, two hundred four million, two hundred two thousand, six hundred forty-six".