21153559480 has 48 divisors (see below), whose sum is σ = 47798656920. Its totient is φ = 8425356864.

The previous prime is 21153559457. The next prime is 21153559481. The reversal of 21153559480 is 8495535112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153559481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15473757 + ... + 15475123.

Almost surely, 2^21153559480 is an apocalyptic number.

21153559480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21153559480 is an abundant number, since it is smaller than the sum of its proper divisors (26645097440).

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

21153559480 is an equidigital number, since it uses as much as digits as its factorization.

21153559480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 21153559480 in words is "twenty-one billion, one hundred fifty-three million, five hundred fifty-nine thousand, four hundred eighty".