21192407047 has 12 divisors (see below), whose sum is σ = 24800020560. Its totient is φ = 18056141376.

The previous prime is 21192407029. The next prime is 21192407051. The reversal of 21192407047 is 74070429112.

It is not a de Polignac number, because 21192407047 - 2²³ = 21184018439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21192406997 and 21192407015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192407087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1286722 + ... + 1303087.

It is an arithmetic number, because the mean of its divisors is an integer number (2066668380).

Almost surely, 2^21192407047 is an apocalyptic number.

21192407047 is a deficient number, since it is larger than the sum of its proper divisors (3607613513).

21192407047 is a wasteful number, since it uses less digits than its factorization.

21192407047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589990 (or 2589983 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 21192407047 in words is "twenty-one billion, one hundred ninety-two million, four hundred seven thousand, forty-seven".