20426480 has 40 divisors (see below), whose sum is σ = 47702304. Its totient is φ = 8134400.

The previous prime is 20426473. The next prime is 20426509. The reversal of 20426480 is 8462402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24470 + ... + 25290.

Almost surely, 2^20426480 is an apocalyptic number.

20426480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20426480 is an abundant number, since it is smaller than the sum of its proper divisors (27275824).

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

20426480 is a wasteful number, since it uses less digits than its factorization.

20426480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20426480 is about 4519.5663508793. The cubic root of 20426480 is about 273.3576156628.

Adding to 20426480 its reverse (8462402), we get a palindrome (28888882).

The spelling of 20426480 in words is "twenty million, four hundred twenty-six thousand, four hundred eighty".