21981152614 has 8 divisors (see below), whose sum is σ = 33115710960. Its totient is φ = 10942582296.

The previous prime is 21981152603. The next prime is 21981152617. The reversal of 21981152614 is 41625118912.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21981152617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23996434 + ... + 23997349.

It is an arithmetic number, because the mean of its divisors is an integer number (4139463870).

Almost surely, 2^21981152614 is an apocalyptic number.

21981152614 is a deficient number, since it is larger than the sum of its proper divisors (11134558346).

21981152614 is a wasteful number, since it uses less digits than its factorization.

21981152614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47994014.

The product of its digits is 34560, while the sum is 40.

The spelling of 21981152614 in words is "twenty-one billion, nine hundred eighty-one million, one hundred fifty-two thousand, six hundred fourteen".