21694545122 has 4 divisors (see below), whose sum is σ = 32541817686. Its totient is φ = 10847272560.

The previous prime is 21694545043. The next prime is 21694545137. The reversal of 21694545122 is 22154549612.

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

It can be written as a sum of positive squares in only one way, i.e., 13862472121 + 7832073001 = 117739^2 + 88499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21694545122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5423636279 + ... + 5423636282.

Almost surely, 2^21694545122 is an apocalyptic number.

21694545122 is a deficient number, since it is larger than the sum of its proper divisors (10847272564).

21694545122 is a wasteful number, since it uses less digits than its factorization.

21694545122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10847272563.

The product of its digits is 172800, while the sum is 41.

The spelling of 21694545122 in words is "twenty-one billion, six hundred ninety-four million, five hundred forty-five thousand, one hundred twenty-two".