21740482137 has 8 divisors (see below), whose sum is σ = 31622519520. Its totient is φ = 13176049760.

The previous prime is 21740482129. The next prime is 21740482151. The reversal of 21740482137 is 73128404712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21740482137 - 2³ = 21740482129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21740482095 and 21740482104.

It is not an unprimeable number, because it can be changed into a prime (21740482177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329401212 + ... + 329401277.

It is an arithmetic number, because the mean of its divisors is an integer number (3952814940).

Almost surely, 2^21740482137 is an apocalyptic number.

It is an amenable number.

21740482137 is a deficient number, since it is larger than the sum of its proper divisors (9882037383).

21740482137 is a wasteful number, since it uses less digits than its factorization.

21740482137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658802503.

The product of its (nonzero) digits is 75264, while the sum is 39.

Adding to 21740482137 its reverse (73128404712), we get a palindrome (94868886849).

The spelling of 21740482137 in words is "twenty-one billion, seven hundred forty million, four hundred eighty-two thousand, one hundred thirty-seven".