20123015719 has 8 divisors (see below), whose sum is σ = 21315495168. Its totient is φ = 18931511040.

The previous prime is 20123015659. The next prime is 20123015723. The reversal of 20123015719 is 91751032102.

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 20123015719 - 2²⁹ = 19586144807 is a prime.

It is a super-2 number, since 2×20123015719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123015749) 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, 200967 + ... + 283960.

It is an arithmetic number, because the mean of its divisors is an integer number (2664436896).

Almost surely, 2^20123015719 is an apocalyptic number.

20123015719 is a deficient number, since it is larger than the sum of its proper divisors (1192479449).

20123015719 is a wasteful number, since it uses less digits than its factorization.

20123015719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487385.

The product of its (nonzero) digits is 3780, while the sum is 31.

The spelling of 20123015719 in words is "twenty billion, one hundred twenty-three million, fifteen thousand, seven hundred nineteen".