21137006941 has 4 divisors (see below), whose sum is σ = 21148305984. Its totient is φ = 21125707900.

The previous prime is 21137006939. The next prime is 21137006951. The reversal of 21137006941 is 14960073112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21137006941 - 2¹ = 21137006939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21137006897 and 21137006906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21137006911) 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, 5646715 + ... + 5650456.

It is an arithmetic number, because the mean of its divisors is an integer number (5287076496).

Almost surely, 2^21137006941 is an apocalyptic number.

It is an amenable number.

21137006941 is a deficient number, since it is larger than the sum of its proper divisors (11299043).

21137006941 is a wasteful number, since it uses less digits than its factorization.

21137006941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11299042.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 21137006941 in words is "twenty-one billion, one hundred thirty-seven million, six thousand, nine hundred forty-one".