20239202407 has 8 divisors (see below), whose sum is σ = 20905132032. Its totient is φ = 19574088600.

The previous prime is 20239202381. The next prime is 20239202453. The reversal of 20239202407 is 70420293202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20239202407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20239202707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153319 + ... + 252952.

It is an arithmetic number, because the mean of its divisors is an integer number (2613141504).

Almost surely, 2^20239202407 is an apocalyptic number.

20239202407 is a deficient number, since it is larger than the sum of its proper divisors (665929625).

20239202407 is a wasteful number, since it uses less digits than its factorization.

20239202407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407909.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 20239202407 its reverse (70420293202), we get a palindrome (90659495609).

The spelling of 20239202407 in words is "twenty billion, two hundred thirty-nine million, two hundred two thousand, four hundred seven".