20420058 has 16 divisors (see below), whose sum is σ = 41067936. Its totient is φ = 6768720.

The previous prime is 20420053. The next prime is 20420063. The reversal of 20420058 is 85002402.

Added to its reverse (85002402) it gives a triangular number (105422460 = T₁₄₅₂₀).

It is an interprime number because it is at equal distance from previous prime (20420053) and next prime (20420063).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20420051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8316 + ... + 10487.

It is an arithmetic number, because the mean of its divisors is an integer number (2566746).

Almost surely, 2^20420058 is an apocalyptic number.

20420058 is an abundant number, since it is smaller than the sum of its proper divisors (20647878).

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

20420058 is a wasteful number, since it uses less digits than its factorization.

20420058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18989.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20420058 is about 4518.8558286363. The cubic root of 20420058 is about 273.3289651625.

Adding to 20420058 its reverse (85002402), we get a triangular number (105422460 = T₁₄₅₂₀).

The spelling of 20420058 in words is "twenty million, four hundred twenty thousand, fifty-eight".