20667426 has 32 divisors (see below), whose sum is σ = 44731008. Its totient is φ = 6328320.

The previous prime is 20667397. The next prime is 20667433. The reversal of 20667426 is 62476602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19531 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (1397844).

Almost surely, 2^20667426 is an apocalyptic number.

20667426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20667426 is an abundant number, since it is smaller than the sum of its proper divisors (24063582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20667426 is a wasteful number, since it uses less digits than its factorization.

20667426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20667426 is about 4546.1440804268. The cubic root of 20667426 is about 274.4282379488.

The spelling of 20667426 in words is "twenty million, six hundred sixty-seven thousand, four hundred twenty-six".