21133022040 has 128 divisors (see below), whose sum is σ = 75862180800. Its totient is φ = 5201971200.

The previous prime is 21133022039. The next prime is 21133022041. The reversal of 21133022040 is 4022033112.

It is an interprime number because it is at equal distance from previous prime (21133022039) and next prime (21133022041).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133022041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 738561 + ... + 766640.

Almost surely, 2^21133022040 is an apocalyptic number.

21133022040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133022040 is an abundant number, since it is smaller than the sum of its proper divisors (54729158760).

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

21133022040 is a wasteful number, since it uses less digits than its factorization.

21133022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505234 (or 1505224 counting only the distinct ones).

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

Adding to 21133022040 its reverse (4022033112), we get a palindrome (25155055152).

The spelling of 21133022040 in words is "twenty-one billion, one hundred thirty-three million, twenty-two thousand, forty".