20899881142 has 8 divisors (see below), whose sum is σ = 35828367696. Its totient is φ = 8957091912.

The previous prime is 20899881113. The next prime is 20899881143. The reversal of 20899881142 is 24118899802.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20899881142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899881143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746424313 + ... + 746424340.

It is an arithmetic number, because the mean of its divisors is an integer number (4478545962).

Almost surely, 2^20899881142 is an apocalyptic number.

20899881142 is a deficient number, since it is larger than the sum of its proper divisors (14928486554).

20899881142 is a wasteful number, since it uses less digits than its factorization.

20899881142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492848662.

The product of its (nonzero) digits is 663552, while the sum is 52.

The spelling of 20899881142 in words is "twenty billion, eight hundred ninety-nine million, eight hundred eighty-one thousand, one hundred forty-two".