21262359480 has 64 divisors (see below), whose sum is σ = 64383258240. Its totient is φ = 5616968832.

The previous prime is 21262359479. The next prime is 21262359487. The reversal of 21262359480 is 8495326212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21262359487) 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, 815134 + ... + 840813.

It is an arithmetic number, because the mean of its divisors is an integer number (1005988410).

Almost surely, 2^21262359480 is an apocalyptic number.

21262359480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21262359480 is an abundant number, since it is smaller than the sum of its proper divisors (43120898760).

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

21262359480 is a wasteful number, since it uses less digits than its factorization.

21262359480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656068 (or 1656064 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 21262359480 in words is "twenty-one billion, two hundred sixty-two million, three hundred fifty-nine thousand, four hundred eighty".