20642292 has 36 divisors (see below), whose sum is σ = 56923776. Its totient is φ = 6255120.

The previous prime is 20642291. The next prime is 20642299. The reversal of 20642292 is 29224602.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20642292² = 852208438026528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25668 + ... + 26459.

It is an arithmetic number, because the mean of its divisors is an integer number (1581216).

Almost surely, 2^20642292 is an apocalyptic number.

20642292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20642292 is an abundant number, since it is smaller than the sum of its proper divisors (36281484).

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

20642292 is a wasteful number, since it uses less digits than its factorization.

20642292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52148 (or 52143 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20642292 is about 4543.3789188224. The cubic root of 20642292 is about 274.3169472432.

Adding to 20642292 its reverse (29224602), we get a palindrome (49866894).

It can be divided in two parts, 2064 and 2292, that added together give a square (4356 = 66²).

The spelling of 20642292 in words is "twenty million, six hundred forty-two thousand, two hundred ninety-two".