20122705391 has 8 divisors (see below), whose sum is σ = 20208286224. Its totient is φ = 20037168000.

The previous prime is 20122705321. The next prime is 20122705409. The reversal of 20122705391 is 19350722102.

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 20122705391 - 2²² = 20118511087 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 (20122705301) 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, 1199735 + ... + 1216391.

It is an arithmetic number, because the mean of its divisors is an integer number (2526035778).

Almost surely, 2^20122705391 is an apocalyptic number.

20122705391 is a deficient number, since it is larger than the sum of its proper divisors (85580833).

20122705391 is a wasteful number, since it uses less digits than its factorization.

20122705391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21721.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 20122705391 in words is "twenty billion, one hundred twenty-two million, seven hundred five thousand, three hundred ninety-one".