20012434493 has 8 divisors (see below), whose sum is σ = 21873173760. Its totient is φ = 18227643840.

The previous prime is 20012434489. The next prime is 20012434523. The reversal of 20012434493 is 39443421002.

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 20012434493 - 2² = 20012434489 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012434433) 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, 18986603 + ... + 18987656.

It is an arithmetic number, because the mean of its divisors is an integer number (2734146720).

Almost surely, 2^20012434493 is an apocalyptic number.

It is an amenable number.

20012434493 is a deficient number, since it is larger than the sum of its proper divisors (1860739267).

20012434493 is a wasteful number, since it uses less digits than its factorization.

20012434493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37974307.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 20012434493 its reverse (39443421002), we get a palindrome (59455855495).

The spelling of 20012434493 in words is "twenty billion, twelve million, four hundred thirty-four thousand, four hundred ninety-three".