21470553351020 has 24 divisors (see below), whose sum is σ = 45109500584064. Its totient is φ = 8584156855296.

The previous prime is 21470553351017. The next prime is 21470553351029. The reversal of 21470553351020 is 2015335507412.

It is a super-2 number, since 2×21470553351020² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21470553351029) 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 7 ways as a sum of consecutive naturals, for example, 253987004 + ... + 254071523.

It is an arithmetic number, because the mean of its divisors is an integer number (1879562524336).

Almost surely, 2^{21470553351020} is an apocalyptic number.

21470553351020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21470553351020 is an abundant number, since it is smaller than the sum of its proper divisors (23638947233044).

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

21470553351020 is a wasteful number, since it uses less digits than its factorization.

21470553351020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508060649 (or 508060647 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

Adding to 21470553351020 its reverse (2015335507412), we get a palindrome (23485888858432).

The spelling of 21470553351020 in words is "twenty-one trillion, four hundred seventy billion, five hundred fifty-three million, three hundred fifty-one thousand, twenty".