21142033020 has 96 divisors (see below), whose sum is σ = 69237100800. Its totient is φ = 5341142592.

The previous prime is 21142033013. The next prime is 21142033049. The reversal of 21142033020 is 2033024112.

21142033020 is a `hidden beast` number, since 211 + 420 + 3 + 30 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21142032984 and 21142033002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020054 + ... + 1040573.

It is an arithmetic number, because the mean of its divisors is an integer number (721219800).

Almost surely, 2^21142033020 is an apocalyptic number.

21142033020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142033020 is an abundant number, since it is smaller than the sum of its proper divisors (48095067780).

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

21142033020 is a wasteful number, since it uses less digits than its factorization.

21142033020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060664 (or 2060656 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21142033020 its reverse (2033024112), we get a palindrome (23175057132).

The spelling of 21142033020 in words is "twenty-one billion, one hundred forty-two million, thirty-three thousand, twenty".