19742576101 has 4 divisors (see below), whose sum is σ = 19856695212. Its totient is φ = 19628456992.

The previous prime is 19742576093. The next prime is 19742576149. The reversal of 19742576101 is 10167524791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8686053601 + 11056522500 = 93199^2 + 105150^2 .

It is a cyclic number.

It is not a de Polignac number, because 19742576101 - 2³ = 19742576093 is a prime.

It is a super-2 number, since 2×19742576101² (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 (19742556101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57059296 + ... + 57059641.

It is an arithmetic number, because the mean of its divisors is an integer number (4964173803).

Almost surely, 2^19742576101 is an apocalyptic number.

It is an amenable number.

19742576101 is a deficient number, since it is larger than the sum of its proper divisors (114119111).

19742576101 is a wasteful number, since it uses less digits than its factorization.

19742576101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114119110.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 19742576101 in words is "nineteen billion, seven hundred forty-two million, five hundred seventy-six thousand, one hundred one".