20872126397 has 8 divisors (see below), whose sum is σ = 22101592896. Its totient is φ = 19642848192.

The previous prime is 20872126391. The next prime is 20872126409. The reversal of 20872126397 is 79362127802.

It is a happy 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 20872126397 - 2⁶ = 20872126333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872126391) 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, 226688 + ... + 305174.

It is an arithmetic number, because the mean of its divisors is an integer number (2762699112).

Almost surely, 2^20872126397 is an apocalyptic number.

It is an amenable number.

20872126397 is a deficient number, since it is larger than the sum of its proper divisors (1229466499).

20872126397 is a wasteful number, since it uses less digits than its factorization.

20872126397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94147.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 20872126397 in words is "twenty billion, eight hundred seventy-two million, one hundred twenty-six thousand, three hundred ninety-seven".