20419929 has 18 divisors (see below), whose sum is σ = 30840810. Its totient is φ = 13018368.

The previous prime is 20419897. The next prime is 20419943. The reversal of 20419929 is 92991402.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 304704 = 4485^2 + 552^2 .

It is not a de Polignac number, because 20419929 - 2⁵ = 20419897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20419893 and 20419902.

It is not an unprimeable number, because it can be changed into a prime (20419229) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2617 + ... + 6905.

Almost surely, 2^20419929 is an apocalyptic number.

It is an amenable number.

20419929 is a deficient number, since it is larger than the sum of its proper divisors (10420881).

20419929 is a wasteful number, since it uses less digits than its factorization.

20419929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 20419929 is about 4518.8415550891. The cubic root of 20419929 is about 273.3283895927.

The spelling of 20419929 in words is "twenty million, four hundred nineteen thousand, nine hundred twenty-nine".