20201143242 has 32 divisors (see below), whose sum is σ = 47663529984. Its totient is φ = 5585569200.

The previous prime is 20201143241. The next prime is 20201143243. The reversal of 20201143242 is 24234110202.

It is an interprime number because it is at equal distance from previous prime (20201143241) and next prime (20201143243).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20201143241) 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, 7756434 + ... + 7759037.

It is an arithmetic number, because the mean of its divisors is an integer number (1489485312).

Almost surely, 2^20201143242 is an apocalyptic number.

20201143242 is an abundant number, since it is smaller than the sum of its proper divisors (27462386742).

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

20201143242 is a wasteful number, since it uses less digits than its factorization.

20201143242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15515514.

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

Adding to 20201143242 its reverse (24234110202), we get a palindrome (44435253444).

The spelling of 20201143242 in words is "twenty billion, two hundred one million, one hundred forty-three thousand, two hundred forty-two".