21692488054 has 4 divisors (see below), whose sum is σ = 32538732084. Its totient is φ = 10846244026.

The previous prime is 21692488039. The next prime is 21692488063. The reversal of 21692488054 is 45088429612.

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

It is a junction number, because it is equal to n+sod(n) for n = 21692487989 and 21692488007.

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, 5423122012 + ... + 5423122015.

It is an arithmetic number, because the mean of its divisors is an integer number (8134683021).

Almost surely, 2^21692488054 is an apocalyptic number.

21692488054 is a deficient number, since it is larger than the sum of its proper divisors (10846244030).

21692488054 is a wasteful number, since it uses less digits than its factorization.

21692488054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10846244029.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 21692488054 in words is "twenty-one billion, six hundred ninety-two million, four hundred eighty-eight thousand, fifty-four".