20606426 has 4 divisors (see below), whose sum is σ = 30909642. Its totient is φ = 10303212.

The previous prime is 20606423. The next prime is 20606429. The reversal of 20606426 is 62460602.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20606423) and next prime (20606429).

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 4405801 = 4025^2 + 2099^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20606395 and 20606404.

It is not an unprimeable number, because it can be changed into a prime (20606423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151605 + ... + 5151608.

Almost surely, 2^20606426 is an apocalyptic number.

20606426 is a deficient number, since it is larger than the sum of its proper divisors (10303216).

20606426 is a wasteful number, since it uses less digits than its factorization.

20606426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10303215.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20606426 is about 4539.4301404471. The cubic root of 20606426 is about 274.1579798288.

The spelling of 20606426 in words is "twenty million, six hundred six thousand, four hundred twenty-six".