20021039142 has 32 divisors (see below), whose sum is σ = 44287710432. Its totient is φ = 5993823744.

The previous prime is 20021039141. The next prime is 20021039147. The reversal of 20021039142 is 24193012002.

It is a super-5 number, since 5×20021039142⁵ (a number of 53 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021039141) 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, 3465763 + ... + 3471534.

It is an arithmetic number, because the mean of its divisors is an integer number (1383990951).

Almost surely, 2^20021039142 is an apocalyptic number.

20021039142 is an abundant number, since it is smaller than the sum of its proper divisors (24266671290).

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

20021039142 is a wasteful number, since it uses less digits than its factorization.

20021039142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937352.

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 20021039142 in words is "twenty billion, twenty-one million, thirty-nine thousand, one hundred forty-two".