20406124 has 6 divisors (see below), whose sum is σ = 35710724. Its totient is φ = 10203060.

The previous prime is 20406119. The next prime is 20406143. The reversal of 20406124 is 42160402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550762 + ... + 2550769.

Almost surely, 2^20406124 is an apocalyptic number.

It is an amenable number.

20406124 is a deficient number, since it is larger than the sum of its proper divisors (15304600).

20406124 is a wasteful number, since it uses less digits than its factorization.

20406124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101535 (or 5101533 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20406124 is about 4517.3138035784. The cubic root of 20406124 is about 273.2667806769.

Adding to 20406124 its reverse (42160402), we get a palindrome (62566526).

The spelling of 20406124 in words is "twenty million, four hundred six thousand, one hundred twenty-four".