20726424 has 24 divisors (see below), whose sum is σ = 56134260. Its totient is φ = 6908784.

The previous prime is 20726399. The next prime is 20726437. The reversal of 20726424 is 42462702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143862 + ... + 144005.

Almost surely, 2^20726424 is an apocalyptic number.

20726424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20726424 is an abundant number, since it is smaller than the sum of its proper divisors (35407836).

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

20726424 is a wasteful number, since it uses less digits than its factorization.

20726424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287879 (or 287872 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20726424 is about 4552.6282519002. The cubic root of 20726424 is about 274.6891208693.

The spelling of 20726424 in words is "twenty million, seven hundred twenty-six thousand, four hundred twenty-four".