21192026445 has 24 divisors (see below), whose sum is σ = 36788637600. Its totient is φ = 11285247456.

The previous prime is 21192026437. The next prime is 21192026461. The reversal of 21192026445 is 54462029112.

It is a happy number.

21192026445 is a `hidden beast` number, since 2 + 1 + 1 + 9 + 2 + 0 + 2 + 644 + 5 = 666.

It is not a de Polignac number, because 21192026445 - 2³ = 21192026437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327655 + ... + 386964.

It is an arithmetic number, because the mean of its divisors is an integer number (1532859900).

Almost surely, 2^21192026445 is an apocalyptic number.

It is an amenable number.

21192026445 is a deficient number, since it is larger than the sum of its proper divisors (15596611155).

21192026445 is a wasteful number, since it uses less digits than its factorization.

21192026445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715289 (or 715286 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21192026445 in words is "twenty-one billion, one hundred ninety-two million, twenty-six thousand, four hundred forty-five".