20135767042 has 4 divisors (see below), whose sum is σ = 30203650566. Its totient is φ = 10067883520.

The previous prime is 20135767037. The next prime is 20135767051. The reversal of 20135767042 is 24076753102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24076753102 = 2 ⋅12038376551.

It can be written as a sum of positive squares in only one way, i.e., 11800259641 + 8335507401 = 108629^2 + 91299^2 .

It is a super-2 number, since 2×20135767042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20135766992 and 20135767010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5033941759 + ... + 5033941762.

Almost surely, 2^20135767042 is an apocalyptic number.

20135767042 is a deficient number, since it is larger than the sum of its proper divisors (10067883524).

20135767042 is a wasteful number, since it uses less digits than its factorization.

20135767042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10067883523.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20135767042 in words is "twenty billion, one hundred thirty-five million, seven hundred sixty-seven thousand, forty-two".