23780421 has 24 divisors (see below), whose sum is σ = 39628160. Its totient is φ = 13460256.

The previous prime is 23780359. The next prime is 23780431. The reversal of 23780421 is 12408732.

23780421 is a `hidden beast` number, since 237 + 8 + 0 + 421 = 666.

It is not a de Polignac number, because 23780421 - 2⁶ = 23780357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23780431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5136 + ... + 8598.

Almost surely, 2^23780421 is an apocalyptic number.

23780421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23780421 is a deficient number, since it is larger than the sum of its proper divisors (15847739).

23780421 is a wasteful number, since it uses less digits than its factorization.

23780421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585 (or 3582 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23780421 is about 4876.5173023378. The cubic root of 23780421 is about 287.5675294427.

The spelling of 23780421 in words is "twenty-three million, seven hundred eighty thousand, four hundred twenty-one".