20574903403646 has 4 divisors (see below), whose sum is σ = 30862355105472. Its totient is φ = 10287451701822.

The previous prime is 20574903403633. The next prime is 20574903403697. The reversal of 20574903403646 is 64630430947502.

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

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, 5143725850910 + ... + 5143725850913.

It is an arithmetic number, because the mean of its divisors is an integer number (7715588776368).

Almost surely, 2^{20574903403646} is an apocalyptic number.

20574903403646 is a deficient number, since it is larger than the sum of its proper divisors (10287451701826).

20574903403646 is a wasteful number, since it uses less digits than its factorization.

20574903403646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287451701825.

The product of its (nonzero) digits is 13063680, while the sum is 53.

The spelling of 20574903403646 in words is "twenty trillion, five hundred seventy-four billion, nine hundred three million, four hundred three thousand, six hundred forty-six".