20534600 has 24 divisors (see below), whose sum is σ = 47743410. Its totient is φ = 8213760.

The previous prime is 20534597. The next prime is 20534603. The reversal of 20534600 is 643502.

It is an interprime number because it is at equal distance from previous prime (20534597) and next prime (20534603).

It can be written as a sum of positive squares in 3 ways, for example, as 17825284 + 2709316 = 4222^2 + 1646^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20534603) 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 5 ways as a sum of consecutive naturals, for example, 51137 + ... + 51536.

Almost surely, 2^20534600 is an apocalyptic number.

20534600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20534600 is an abundant number, since it is smaller than the sum of its proper divisors (27208810).

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

20534600 is a wasteful number, since it uses less digits than its factorization.

20534600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102689 (or 102680 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20534600 is about 4531.5118889836. The cubic root of 20534600 is about 273.8390729235.

The spelling of 20534600 in words is "twenty million, five hundred thirty-four thousand, six hundred".