20727142 has 4 divisors (see below), whose sum is σ = 31090716. Its totient is φ = 10363570.

The previous prime is 20727137. The next prime is 20727167. The reversal of 20727142 is 24172702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24172702 = 2 ⋅12086351.

It is a super-2 number, since 2×20727142² = 859228830976328, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 20727142 parts by 6438 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5181784 + ... + 5181787.

It is an arithmetic number, because the mean of its divisors is an integer number (7772679).

Almost surely, 2^20727142 is an apocalyptic number.

20727142 is a deficient number, since it is larger than the sum of its proper divisors (10363574).

20727142 is a wasteful number, since it uses less digits than its factorization.

20727142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363573.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20727142 is about 4552.7071067663. The cubic root of 20727142 is about 274.6922927384.

Adding to 20727142 its reverse (24172702), we get a palindrome (44899844).

The spelling of 20727142 in words is "twenty million, seven hundred twenty-seven thousand, one hundred forty-two".