20034420849 has 15 divisors (see below), whose sum is σ = 29929865097. Its totient is φ = 13355431308.

The previous prime is 20034420841. The next prime is 20034420853. The reversal of 20034420849 is 94802443002.

The square root of 20034420849 is 141543.

It is a perfect power (a square), and thus also a powerful number.

20034420849 is a `hidden beast` number, since 200 + 3 + 442 + 0 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 20034420849 - 2³ = 20034420841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20034420841) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1266024 + ... + 1281750.

Almost surely, 2^20034420849 is an apocalyptic number.

20034420849 is the 141543-rd square number.

20034420849 is the 70772-nd centered octagonal number.

It is an amenable number.

20034420849 is a deficient number, since it is larger than the sum of its proper divisors (9895444248).

20034420849 is an frugal number, since it uses more digits than its factorization.

20034420849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31466 (or 15730 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Multiplying 20034420849 by its sum of digits (36), we get a square (721239150564 = 849258²).

The spelling of 20034420849 in words is "twenty billion, thirty-four million, four hundred twenty thousand, eight hundred forty-nine".