20235703489 has 4 divisors (see below), whose sum is σ = 20390174640. Its totient is φ = 20081232340.

The previous prime is 20235703469. The next prime is 20235703573. The reversal of 20235703489 is 98430753202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20235703489 - 2⁵ = 20235703457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20235703429) 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, 77235379 + ... + 77235640.

It is an arithmetic number, because the mean of its divisors is an integer number (5097543660).

Almost surely, 2^20235703489 is an apocalyptic number.

It is an amenable number.

20235703489 is a deficient number, since it is larger than the sum of its proper divisors (154471151).

20235703489 is a wasteful number, since it uses less digits than its factorization.

20235703489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154471150.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 20235703489 in words is "twenty billion, two hundred thirty-five million, seven hundred three thousand, four hundred eighty-nine".