20379000721 has 8 divisors (see below), whose sum is σ = 20558096064. Its totient is φ = 20200262160.

The previous prime is 20379000703. The next prime is 20379000731. The reversal of 20379000721 is 12700097302.

It is the 58280-th star number.

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 20379000721 - 2¹⁷ = 20378869649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20379000701) 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, 26196 + ... + 203578.

It is an arithmetic number, because the mean of its divisors is an integer number (2569762008).

Almost surely, 2^20379000721 is an apocalyptic number.

It is an amenable number.

20379000721 is a deficient number, since it is larger than the sum of its proper divisors (179095343).

20379000721 is a wasteful number, since it uses less digits than its factorization.

20379000721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178391.

The product of its (nonzero) digits is 5292, while the sum is 31.

The spelling of 20379000721 in words is "twenty billion, three hundred seventy-nine million, seven hundred twenty-one", and thus it is an aban number.