21967880697 has 16 divisors (see below), whose sum is σ = 37194295680. Its totient is φ = 12553074576.

The previous prime is 21967880659. The next prime is 21967880723. The reversal of 21967880697 is 79608876912.

It is not a de Polignac number, because 21967880697 - 2¹⁶ = 21967815161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (21967880197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58115898 + ... + 58116275.

It is an arithmetic number, because the mean of its divisors is an integer number (2324643480).

Almost surely, 2^21967880697 is an apocalyptic number.

21967880697 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21967880697 is a deficient number, since it is larger than the sum of its proper divisors (15226414983).

21967880697 is a wasteful number, since it uses less digits than its factorization.

21967880697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116232189 (or 116232183 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 21967880697 in words is "twenty-one billion, nine hundred sixty-seven million, eight hundred eighty thousand, six hundred ninety-seven".