19403538061 has 8 divisors (see below), whose sum is σ = 19778603040. Its totient is φ = 19031837232.

The previous prime is 19403538031. The next prime is 19403538101. The reversal of 19403538061 is 16083530491.

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 19403538061 - 2¹¹ = 19403536013 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 (19403538031) 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, 829390 + ... + 852463.

It is an arithmetic number, because the mean of its divisors is an integer number (2472325380).

Almost surely, 2^19403538061 is an apocalyptic number.

It is an amenable number.

19403538061 is a deficient number, since it is larger than the sum of its proper divisors (375064979).

19403538061 is a wasteful number, since it uses less digits than its factorization.

19403538061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682075.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 19403538061 in words is "nineteen billion, four hundred three million, five hundred thirty-eight thousand, sixty-one".