21367633749489 has 6 divisors (see below), whose sum is σ = 30864359860386. Its totient is φ = 14245089166320.

The previous prime is 21367633749467. The next prime is 21367633749541. The reversal of 21367633749489 is 98494733676312.

21367633749489 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 76 + 3 + 3 + 74 + 9 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18684697856400 + 2682935893089 = 4322580^2 + 1637967^2 .

It is not a de Polignac number, because 21367633749489 - 2¹⁶ = 21367633683953 is a prime.

It is a super-2 number, since 2×21367633749489² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21367633744489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1187090763852 + ... + 1187090763869.

It is an arithmetic number, because the mean of its divisors is an integer number (5144059976731).

Almost surely, 2^{21367633749489} is an apocalyptic number.

It is an amenable number.

21367633749489 is a deficient number, since it is larger than the sum of its proper divisors (9496726110897).

21367633749489 is a wasteful number, since it uses less digits than its factorization.

21367633749489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374181527727 (or 2374181527724 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 72.

The spelling of 21367633749489 in words is "twenty-one trillion, three hundred sixty-seven billion, six hundred thirty-three million, seven hundred forty-nine thousand, four hundred eighty-nine".