21970240484 has 24 divisors (see below), whose sum is σ = 39461136288. Its totient is φ = 10696656960.

The previous prime is 21970240441. The next prime is 21970240489. The reversal of 21970240484 is 48404207912.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (21970240489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42302 + ... + 213845.

It is an arithmetic number, because the mean of its divisors is an integer number (1644214012).

Almost surely, 2^21970240484 is an apocalyptic number.

It is an amenable number.

21970240484 is a deficient number, since it is larger than the sum of its proper divisors (17490895804).

21970240484 is a wasteful number, since it uses less digits than its factorization.

21970240484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256715 (or 256713 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 21970240484 in words is "twenty-one billion, nine hundred seventy million, two hundred forty thousand, four hundred eighty-four".