20562040 has 16 divisors (see below), whose sum is σ = 46264680. Its totient is φ = 8224800.

The previous prime is 20562029. The next prime is 20562043. The reversal of 20562040 is 4026502.

It is a junction number, because it is equal to n+sod(n) for n = 20561999 and 20562017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20562043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256986 + ... + 257065.

Almost surely, 2^20562040 is an apocalyptic number.

20562040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20562040 is an abundant number, since it is smaller than the sum of its proper divisors (25702640).

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

20562040 is a wasteful number, since it uses less digits than its factorization.

20562040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514062 (or 514058 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20562040 is about 4534.5385652787. The cubic root of 20562040 is about 273.9609939679.

Adding to 20562040 its reverse (4026502), we get a palindrome (24588542).

It can be divided in two parts, 2056 and 2040, that added together give a 12-th power (4096 = 2¹²).

The spelling of 20562040 in words is "twenty million, five hundred sixty-two thousand, forty".