21488288412 has 48 divisors (see below), whose sum is σ = 53774098560. Its totient is φ = 6657738048.

The previous prime is 21488288411. The next prime is 21488288413.

It is a happy number.

21488288412 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21488288411) and next prime (21488288413).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21488288411) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 877038 + ... + 901205.

It is an arithmetic number, because the mean of its divisors is an integer number (1120293720).

Almost surely, 2^21488288412 is an apocalyptic number.

It is an amenable number.

21488288412 is an abundant number, since it is smaller than the sum of its proper divisors (32285810148).

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

21488288412 is a wasteful number, since it uses less digits than its factorization.

21488288412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778322 (or 1778320 counting only the distinct ones).

The product of its digits is 524288, while the sum is 48.

The spelling of 21488288412 in words is "twenty-one billion, four hundred eighty-eight million, two hundred eighty-eight thousand, four hundred twelve".