21768102 has 20 divisors (see below), whose sum is σ = 48777036. Its totient is φ = 7255980.

The previous prime is 21768101. The next prime is 21768113. The reversal of 21768102 is 20186712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21768101) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 67024 + ... + 67347.

Almost surely, 2^21768102 is an apocalyptic number.

21768102 is an abundant number, since it is smaller than the sum of its proper divisors (27008934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21768102 is a wasteful number, since it uses less digits than its factorization.

21768102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134385 (or 134376 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 21768102 is about 4665.6298610156. The cubic root of 21768102 is about 279.2159271900.

The spelling of 21768102 in words is "twenty-one million, seven hundred sixty-eight thousand, one hundred two".