20010420 has 72 divisors (see below), whose sum is σ = 63903840. Its totient is φ = 5054400.

The previous prime is 20010409. The next prime is 20010443. The reversal of 20010420 is 2401002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495 + ... + 6345.

Almost surely, 2^20010420 is an apocalyptic number.

20010420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20010420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31951920).

20010420 is an abundant number, since it is smaller than the sum of its proper divisors (43893420).

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

20010420 is a wasteful number, since it uses less digits than its factorization.

20010420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5885 (or 5880 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20010420 is about 4473.3007947152. The cubic root of 20010420 is about 271.4888938611.

Adding to 20010420 its reverse (2401002), we get a palindrome (22411422).

The spelling of 20010420 in words is "twenty million, ten thousand, four hundred twenty".