20434037387 has 4 divisors (see below), whose sum is σ = 20445898680. Its totient is φ = 20422176096.

The previous prime is 20434037381. The next prime is 20434037413. The reversal of 20434037387 is 78373043402.

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

It is a cyclic number.

It is not a de Polignac number, because 20434037387 - 2²⁸ = 20165601931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20434037381) 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, 5928062 + ... + 5931507.

It is an arithmetic number, because the mean of its divisors is an integer number (5111474670).

Almost surely, 2^20434037387 is an apocalyptic number.

20434037387 is a deficient number, since it is larger than the sum of its proper divisors (11861293).

20434037387 is a wasteful number, since it uses less digits than its factorization.

20434037387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11861292.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 20434037387 in words is "twenty billion, four hundred thirty-four million, thirty-seven thousand, three hundred eighty-seven".