20135464742 has 4 divisors (see below), whose sum is σ = 30203197116. Its totient is φ = 10067732370.

The previous prime is 20135464693. The next prime is 20135464771. The reversal of 20135464742 is 24746453102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20135464696 and 20135464705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5033866184 + ... + 5033866187.

It is an arithmetic number, because the mean of its divisors is an integer number (7550799279).

Almost surely, 2^20135464742 is an apocalyptic number.

20135464742 is a deficient number, since it is larger than the sum of its proper divisors (10067732374).

20135464742 is a wasteful number, since it uses less digits than its factorization.

20135464742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10067732373.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 20135464742 in words is "twenty billion, one hundred thirty-five million, four hundred sixty-four thousand, seven hundred forty-two".