21235693248 has 336 divisors, whose sum is σ = 76116119040. Its totient is φ = 5499187200.

The previous prime is 21235693231. The next prime is 21235693277. The reversal of 21235693248 is 84239653212.

21235693248 is a `hidden beast` number, since 2 + 12 + 3 + 569 + 32 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23106933 + ... + 23107851.

Almost surely, 2^21235693248 is an apocalyptic number.

21235693248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21235693248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38058059520).

21235693248 is an abundant number, since it is smaller than the sum of its proper divisors (54880425792).

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

21235693248 is a wasteful number, since it uses less digits than its factorization.

21235693248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1463 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 21235693248 in words is "twenty-one billion, two hundred thirty-five million, six hundred ninety-three thousand, two hundred forty-eight".