21976145000686 has 4 divisors (see below), whose sum is σ = 32964217501032. Its totient is φ = 10988072500342.

The previous prime is 21976145000683. The next prime is 21976145000701. The reversal of 21976145000686 is 68600054167912.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21976145000683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5494036250170 + ... + 5494036250173.

It is an arithmetic number, because the mean of its divisors is an integer number (8241054375258).

Almost surely, 2^{21976145000686} is an apocalyptic number.

21976145000686 is a deficient number, since it is larger than the sum of its proper divisors (10988072500346).

21976145000686 is a wasteful number, since it uses less digits than its factorization.

21976145000686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10988072500345.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 21976145000686 in words is "twenty-one trillion, nine hundred seventy-six billion, one hundred forty-five million, six hundred eighty-six", and thus it is an aban number.