20355130 has 8 divisors (see below), whose sum is σ = 36639252. Its totient is φ = 8142048.

The previous prime is 20355121. The next prime is 20355133. The reversal of 20355130 is 3155302.

It can be written as a sum of positive squares in 2 ways, for example, as 19439281 + 915849 = 4409^2 + 957^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20355098 and 20355107.

It is not an unprimeable number, because it can be changed into a prime (20355133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1017747 + ... + 1017766.

Almost surely, 2^20355130 is an apocalyptic number.

20355130 is a deficient number, since it is larger than the sum of its proper divisors (16284122).

20355130 is a wasteful number, since it uses less digits than its factorization.

20355130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035520.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20355130 is about 4511.6659894101. The cubic root of 20355130 is about 273.0389636095.

It can be divided in two parts, 20355 and 130, that multiplied together give a triangular number (2646150 = T₂₃₀₀).

The spelling of 20355130 in words is "twenty million, three hundred fifty-five thousand, one hundred thirty".