20435410431 has 16 divisors (see below), whose sum is σ = 30277797120. Its totient is φ = 13622205240.

The previous prime is 20435410427. The next prime is 20435410441. The reversal of 20435410431 is 13401453402.

It is a happy number.

20435410431 is a `hidden beast` number, since 204 + 3 + 5 + 410 + 43 + 1 = 666.

It is not a de Polignac number, because 20435410431 - 2² = 20435410427 is a prime.

It is a super-2 number, since 2×20435410431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20435410395 and 20435410404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435410421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274096 + ... + 340586.

It is an arithmetic number, because the mean of its divisors is an integer number (1892362320).

Almost surely, 2^20435410431 is an apocalyptic number.

20435410431 is a deficient number, since it is larger than the sum of its proper divisors (9842386689).

20435410431 is a wasteful number, since it uses less digits than its factorization.

20435410431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77883 (or 77877 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20435410431 its reverse (13401453402), we get a palindrome (33836863833).

The spelling of 20435410431 in words is "twenty billion, four hundred thirty-five million, four hundred ten thousand, four hundred thirty-one".