20421852946 has 8 divisors (see below), whose sum is σ = 33417577584. Its totient is φ = 9282660420.

The previous prime is 20421852931. The next prime is 20421853031. The reversal of 20421852946 is 64925812402.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464133000 + ... + 464133043.

It is an arithmetic number, because the mean of its divisors is an integer number (4177197198).

Almost surely, 2^20421852946 is an apocalyptic number.

20421852946 is a deficient number, since it is larger than the sum of its proper divisors (12995724638).

20421852946 is a wasteful number, since it uses less digits than its factorization.

20421852946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928266056.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 20421852946 in words is "twenty billion, four hundred twenty-one million, eight hundred fifty-two thousand, nine hundred forty-six".