20726040 has 32 divisors (see below), whose sum is σ = 62178480. Its totient is φ = 5526912.

The previous prime is 20726029. The next prime is 20726047. The reversal of 20726040 is 4062702.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20725998 and 20726016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86239 + ... + 86478.

Almost surely, 2^20726040 is an apocalyptic number.

20726040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20726040 is an abundant number, since it is smaller than the sum of its proper divisors (41452440).

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

20726040 is a wasteful number, since it uses less digits than its factorization.

20726040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172731 (or 172727 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20726040 is about 4552.5860782636. The cubic root of 20726040 is about 274.6874244636.

Adding to 20726040 its reverse (4062702), we get a palindrome (24788742).

The spelling of 20726040 in words is "twenty million, seven hundred twenty-six thousand, forty".