20426142 has 32 divisors (see below), whose sum is σ = 44820864. Its totient is φ = 6154400.

The previous prime is 20426137. The next prime is 20426143. The reversal of 20426142 is 24162402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12217 + ... + 13787.

It is an arithmetic number, because the mean of its divisors is an integer number (1400652).

Almost surely, 2^20426142 is an apocalyptic number.

20426142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20426142 is an abundant number, since it is smaller than the sum of its proper divisors (24394722).

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

20426142 is a wasteful number, since it uses less digits than its factorization.

20426142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20426142 is about 4519.5289577565. The cubic root of 20426142 is about 273.3561078915.

Adding to 20426142 its reverse (24162402), we get a palindrome (44588544).

The spelling of 20426142 in words is "twenty million, four hundred twenty-six thousand, one hundred forty-two".