21053489260 has 24 divisors (see below), whose sum is σ = 45153017280. Its totient is φ = 8242216704.

The previous prime is 21053489221. The next prime is 21053489269. The reversal of 21053489260 is 6298435012.

It is not an unprimeable number, because it can be changed into a prime (21053489269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11197725 + ... + 11199604.

It is an arithmetic number, because the mean of its divisors is an integer number (1881375720).

Almost surely, 2^21053489260 is an apocalyptic number.

21053489260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21053489260 is an abundant number, since it is smaller than the sum of its proper divisors (24099528020).

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

21053489260 is a wasteful number, since it uses less digits than its factorization.

21053489260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397385 (or 22397383 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21053489260 in words is "twenty-one billion, fifty-three million, four hundred eighty-nine thousand, two hundred sixty".