21436741137 has 24 divisors (see below), whose sum is σ = 33254728416. Its totient is φ = 12247390848.

The previous prime is 21436741111. The next prime is 21436741153. The reversal of 21436741137 is 73114763412.

It is not a de Polignac number, because 21436741137 - 2¹¹ = 21436739089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21436741095 and 21436741104.

It is not an unprimeable number, because it can be changed into a prime (21436741237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1207318 + ... + 1224944.

It is an arithmetic number, because the mean of its divisors is an integer number (1385613684).

Almost surely, 2^21436741137 is an apocalyptic number.

It is an amenable number.

21436741137 is a deficient number, since it is larger than the sum of its proper divisors (11817987279).

21436741137 is a wasteful number, since it uses less digits than its factorization.

21436741137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25917 (or 25910 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The spelling of 21436741137 in words is "twenty-one billion, four hundred thirty-six million, seven hundred forty-one thousand, one hundred thirty-seven".