21362345436 has 48 divisors (see below), whose sum is σ = 51400387584. Its totient is φ = 6901594176.

The previous prime is 21362345423. The next prime is 21362345441. The reversal of 21362345436 is 63454326312.

It is a junction number, because it is equal to n+sod(n) for n = 21362345394 and 21362345403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125775 + ... + 241958.

It is an arithmetic number, because the mean of its divisors is an integer number (1070841408).

Almost surely, 2^21362345436 is an apocalyptic number.

It is an amenable number.

21362345436 is an abundant number, since it is smaller than the sum of its proper divisors (30038042148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21362345436 is a wasteful number, since it uses less digits than its factorization.

21362345436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367890 (or 367888 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The spelling of 21362345436 in words is "twenty-one billion, three hundred sixty-two million, three hundred forty-five thousand, four hundred thirty-six".