21262246044 has 48 divisors (see below), whose sum is σ = 53661609120. Its totient is φ = 6513649920.

The previous prime is 21262246043. The next prime is 21262246073. The reversal of 21262246044 is 44064226212.

It is a junction number, because it is equal to n+sod(n) for n = 21262245996 and 21262246014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21262246043) 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, 261867 + ... + 333314.

It is an arithmetic number, because the mean of its divisors is an integer number (1117950190).

Almost surely, 2^21262246044 is an apocalyptic number.

It is an amenable number.

21262246044 is an abundant number, since it is smaller than the sum of its proper divisors (32399363076).

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

21262246044 is a wasteful number, since it uses less digits than its factorization.

21262246044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595430 (or 595428 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The spelling of 21262246044 in words is "twenty-one billion, two hundred sixty-two million, two hundred forty-six thousand, forty-four".