20402426241 has 12 divisors (see below), whose sum is σ = 29493782500. Its totient is φ = 13590720000.

The previous prime is 20402426237. The next prime is 20402426249. The reversal of 20402426241 is 14262420402.

It can be written as a sum of positive squares in 2 ways, for example, as 9524979216 + 10877447025 = 97596^2 + 104295^2 .

It is not a de Polignac number, because 20402426241 - 2² = 20402426237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20402426249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 896260 + ... + 918741.

Almost surely, 2^20402426241 is an apocalyptic number.

It is an amenable number.

20402426241 is a deficient number, since it is larger than the sum of its proper divisors (9091356259).

20402426241 is a wasteful number, since it uses less digits than its factorization.

20402426241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816256 (or 1816253 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20402426241 its reverse (14262420402), we get a palindrome (34664846643).

The spelling of 20402426241 in words is "twenty billion, four hundred two million, four hundred twenty-six thousand, two hundred forty-one".