21190754448 has 30 divisors (see below), whose sum is σ = 59304681254. Its totient is φ = 7063584768.

The previous prime is 21190754423. The next prime is 21190754461. The reversal of 21190754448 is 84445709112.

21190754448 is a `hidden beast` number, since 2 + 11 + 90 + 7 + 544 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15052345344 + 6138409104 = 122688^2 + 78348^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73578865 + ... + 73579152.

Almost surely, 2^21190754448 is an apocalyptic number.

It is an amenable number.

21190754448 is an abundant number, since it is smaller than the sum of its proper divisors (38113926806).

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

21190754448 is a wasteful number, since it uses less digits than its factorization.

21190754448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147158031 (or 147158022 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 21190754448 in words is "twenty-one billion, one hundred ninety million, seven hundred fifty-four thousand, four hundred forty-eight".