20449020429 has 8 divisors (see below), whose sum is σ = 30294845120. Its totient is φ = 13632680268.

The previous prime is 20449020407. The next prime is 20449020457. The reversal of 20449020429 is 92402094402.

20449020429 is a `hidden beast` number, since 2 + 0 + 449 + 0 + 204 + 2 + 9 = 666.

It is not a de Polignac number, because 20449020429 - 2¹⁵ = 20448987661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20449020393 and 20449020402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449020329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378685537 + ... + 378685590.

It is an arithmetic number, because the mean of its divisors is an integer number (3786855640).

Almost surely, 2^20449020429 is an apocalyptic number.

It is an amenable number.

20449020429 is a deficient number, since it is larger than the sum of its proper divisors (9845824691).

20449020429 is an equidigital number, since it uses as much as digits as its factorization.

20449020429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757371136 (or 757371130 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20449020429 in words is "twenty billion, four hundred forty-nine million, twenty thousand, four hundred twenty-nine".