21141020424 has 32 divisors (see below), whose sum is σ = 52978716000. Its totient is φ = 7030184832.

The previous prime is 21141020419. The next prime is 21141020471. The reversal of 21141020424 is 42402014112.

It is a self number, because there is not a number n which added to its sum of digits gives 21141020424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041109 + ... + 1061220.

It is an arithmetic number, because the mean of its divisors is an integer number (1655584875).

Almost surely, 2^21141020424 is an apocalyptic number.

21141020424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21141020424 is an abundant number, since it is smaller than the sum of its proper divisors (31837695576).

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

21141020424 is a wasteful number, since it uses less digits than its factorization.

21141020424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102757 (or 2102753 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21141020424 its reverse (42402014112), we get a palindrome (63543034536).

The spelling of 21141020424 in words is "twenty-one billion, one hundred forty-one million, twenty thousand, four hundred twenty-four".