20438524 has 6 divisors (see below), whose sum is σ = 35767424. Its totient is φ = 10219260.

The previous prime is 20438521. The next prime is 20438567. The reversal of 20438524 is 42583402.

It is a junction number, because it is equal to n+sod(n) for n = 20438492 and 20438501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20438521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554812 + ... + 2554819.

Almost surely, 2^20438524 is an apocalyptic number.

It is an amenable number.

20438524 is a deficient number, since it is larger than the sum of its proper divisors (15328900).

20438524 is a wasteful number, since it uses less digits than its factorization.

20438524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109635 (or 5109633 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 20438524 is about 4520.8985832465. The cubic root of 20438524 is about 273.4113314320.

The spelling of 20438524 in words is "twenty million, four hundred thirty-eight thousand, five hundred twenty-four".