21454501040 has 60 divisors (see below), whose sum is σ = 58025678976. Its totient is φ = 7355827584.

The previous prime is 21454501009. The next prime is 21454501043. The reversal of 21454501040 is 4010545412.

It is a super-2 number, since 2×21454501040² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21454501043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2732624 + ... + 2740463.

Almost surely, 2^21454501040 is an apocalyptic number.

21454501040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21454501040 is an abundant number, since it is smaller than the sum of its proper divisors (36571177936).

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

21454501040 is a wasteful number, since it uses less digits than its factorization.

21454501040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473114 (or 5473101 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 21454501040 in words is "twenty-one billion, four hundred fifty-four million, five hundred one thousand, forty".