20462140 has 12 divisors (see below), whose sum is σ = 42970536. Its totient is φ = 8184848.

The previous prime is 20462137. The next prime is 20462149. The reversal of 20462140 is 4126402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20462149) 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, 511534 + ... + 511573.

It is an arithmetic number, because the mean of its divisors is an integer number (3580878).

Almost surely, 2^20462140 is an apocalyptic number.

20462140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20462140 is an abundant number, since it is smaller than the sum of its proper divisors (22508396).

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

20462140 is a wasteful number, since it uses less digits than its factorization.

20462140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023116 (or 1023114 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20462140 is about 4523.5096993375. The cubic root of 20462140 is about 273.5165966442.

Adding to 20462140 its reverse (4126402), we get a palindrome (24588542).

It can be divided in two parts, 20462 and 140, that added together give a palindrome (20602).

The spelling of 20462140 in words is "twenty million, four hundred sixty-two thousand, one hundred forty".