19400520701 has 4 divisors (see below), whose sum is σ = 19439400000. Its totient is φ = 19361641404.

The previous prime is 19400520673. The next prime is 19400520707. The reversal of 19400520701 is 10702500491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19400520701 - 2²⁶ = 19333411837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19400520707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19438901 + ... + 19439898.

It is an arithmetic number, because the mean of its divisors is an integer number (4859850000).

Almost surely, 2^19400520701 is an apocalyptic number.

It is an amenable number.

19400520701 is a deficient number, since it is larger than the sum of its proper divisors (38879299).

19400520701 is an equidigital number, since it uses as much as digits as its factorization.

19400520701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38879298.

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 19400520701 in words is "nineteen billion, four hundred million, five hundred twenty thousand, seven hundred one".