20435000004031 has 4 divisors (see below), whose sum is σ = 20436943798432. Its totient is φ = 20433056209632.

The previous prime is 20435000003993. The next prime is 20435000004053. The reversal of 20435000004031 is 13040000053402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20435000004031 is a prime.

It is a super-2 number, since 2×20435000004031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20435000003993 and 20435000004011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435000304031) 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, 971881431 + ... + 971902456.

It is an arithmetic number, because the mean of its divisors is an integer number (5109235949608).

Almost surely, 2^{20435000004031} is an apocalyptic number.

20435000004031 is a deficient number, since it is larger than the sum of its proper divisors (1943794401).

20435000004031 is a wasteful number, since it uses less digits than its factorization.

20435000004031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943794400.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20435000004031 its reverse (13040000053402), we get a palindrome (33475000057433).

The spelling of 20435000004031 in words is "twenty trillion, four hundred thirty-five billion, four thousand, thirty-one".