20150642 has 8 divisors (see below), whose sum is σ = 30335916. Its totient is φ = 10038672.

The previous prime is 20150633. The next prime is 20150677. The reversal of 20150642 is 24605102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 160801 = 4471^2 + 401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17633 + ... + 18740.

Almost surely, 2^20150642 is an apocalyptic number.

20150642 is a deficient number, since it is larger than the sum of its proper divisors (10185274).

20150642 is a wasteful number, since it uses less digits than its factorization.

20150642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36652.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20150642 is about 4488.9466470432. The cubic root of 20150642 is about 272.1215665505.

Adding to 20150642 its reverse (24605102), we get a palindrome (44755744).

The spelling of 20150642 in words is "twenty million, one hundred fifty thousand, six hundred forty-two".