21070447632 has 240 divisors, whose sum is σ = 70780469760. Its totient is φ = 5780533248.

The previous prime is 21070447627. The next prime is 21070447681. The reversal of 21070447632 is 23674407012.

21070447632 is a `hidden beast` number, since 2 + 10 + 7 + 0 + 4 + 4 + 7 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 587233 + ... + 622079.

It is an arithmetic number, because the mean of its divisors is an integer number (294918624).

Almost surely, 2^21070447632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21070447632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35390234880).

21070447632 is an abundant number, since it is smaller than the sum of its proper divisors (49710022128).

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

21070447632 is a wasteful number, since it uses less digits than its factorization.

21070447632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34910 (or 34901 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 21070447632 in words is "twenty-one billion, seventy million, four hundred forty-seven thousand, six hundred thirty-two".