20046379721 has 8 divisors (see below), whose sum is σ = 20919445440. Its totient is φ = 19173437712.

The previous prime is 20046379709. The next prime is 20046379733. The reversal of 20046379721 is 12797364002.

It is an interprime number because it is at equal distance from previous prime (20046379709) and next prime (20046379733).

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

It is a cyclic number.

It is not a de Polignac number, because 20046379721 - 2⁶ = 20046379657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20046379421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479951 + ... + 520043.

It is an arithmetic number, because the mean of its divisors is an integer number (2614930680).

Almost surely, 2^20046379721 is an apocalyptic number.

It is an amenable number.

20046379721 is a deficient number, since it is larger than the sum of its proper divisors (873065719).

20046379721 is a wasteful number, since it uses less digits than its factorization.

20046379721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61855.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 20046379721 in words is "twenty billion, forty-six million, three hundred seventy-nine thousand, seven hundred twenty-one".