20672424 has 24 divisors (see below), whose sum is σ = 55988010. Its totient is φ = 6890784.

The previous prime is 20672419. The next prime is 20672441. The reversal of 20672424 is 42427602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 260100 = 4518^2 + 510^2 .

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

It is a super-2 number, since 2×20672424² = 854698228071552, which contains 22 as substring.

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, 143487 + ... + 143630.

Almost surely, 2^20672424 is an apocalyptic number.

20672424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20672424 is an abundant number, since it is smaller than the sum of its proper divisors (35315586).

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

20672424 is a wasteful number, since it uses less digits than its factorization.

20672424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287129 (or 287122 counting only the distinct ones).

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

The square root of 20672424 is about 4546.6937438099. The cubic root of 20672424 is about 274.4503578101.

The spelling of 20672424 in words is "twenty million, six hundred seventy-two thousand, four hundred twenty-four".