21220033429 has 32 divisors (see below), whose sum is σ = 25151938560. Its totient is φ = 17523646272.

The previous prime is 21220033411. The next prime is 21220033447. The reversal of 21220033429 is 92433002212.

It is an interprime number because it is at equal distance from previous prime (21220033411) and next prime (21220033447).

It is a cyclic number.

It is not a de Polignac number, because 21220033429 - 2¹⁷ = 21219902357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220033397 and 21220033406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220073429) 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, 24588252 + ... + 24589114.

It is an arithmetic number, because the mean of its divisors is an integer number (785998080).

Almost surely, 2^21220033429 is an apocalyptic number.

It is an amenable number.

21220033429 is a deficient number, since it is larger than the sum of its proper divisors (3931905131).

21220033429 is a wasteful number, since it uses less digits than its factorization.

21220033429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 21220033429 in words is "twenty-one billion, two hundred twenty million, thirty-three thousand, four hundred twenty-nine".