21764906102 has 4 divisors (see below), whose sum is σ = 32647359156. Its totient is φ = 10882453050.

The previous prime is 21764906099. The next prime is 21764906143. The reversal of 21764906102 is 20160946712.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21764906102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5441226524 + ... + 5441226527.

It is an arithmetic number, because the mean of its divisors is an integer number (8161839789).

Almost surely, 2^21764906102 is an apocalyptic number.

21764906102 is a deficient number, since it is larger than the sum of its proper divisors (10882453054).

21764906102 is a wasteful number, since it uses less digits than its factorization.

21764906102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10882453053.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 21764906102 in words is "twenty-one billion, seven hundred sixty-four million, nine hundred six thousand, one hundred two".