20101420 has 12 divisors (see below), whose sum is σ = 42213024. Its totient is φ = 8040560.

The previous prime is 20101399. The next prime is 20101421. The reversal of 20101420 is 2410102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20101397 and 20101406.

It is not an unprimeable number, because it can be changed into a prime (20101421) 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, 502516 + ... + 502555.

It is an arithmetic number, because the mean of its divisors is an integer number (3517752).

Almost surely, 2^20101420 is an apocalyptic number.

20101420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101420 is an abundant number, since it is smaller than the sum of its proper divisors (22111604).

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

20101420 is a wasteful number, since it uses less digits than its factorization.

20101420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005080 (or 1005078 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20101420 is about 4483.4607169016. The cubic root of 20101420 is about 271.8998153242.

Adding to 20101420 its reverse (2410102), we get a palindrome (22511522).

The spelling of 20101420 in words is "twenty million, one hundred one thousand, four hundred twenty".