21488153420 has 48 divisors (see below), whose sum is σ = 47104339968. Its totient is φ = 8218541760.

The previous prime is 21488153389. The next prime is 21488153429. The reversal of 21488153420 is 2435188412.

It is not an unprimeable number, because it can be changed into a prime (21488153429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560365 + ... + 1574075.

It is an arithmetic number, because the mean of its divisors is an integer number (981340416).

Almost surely, 2^21488153420 is an apocalyptic number.

21488153420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21488153420 is an abundant number, since it is smaller than the sum of its proper divisors (25616186548).

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

21488153420 is a wasteful number, since it uses less digits than its factorization.

21488153420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17150 (or 17148 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 21488153420 in words is "twenty-one billion, four hundred eighty-eight million, one hundred fifty-three thousand, four hundred twenty".