20402632442 has 8 divisors (see below), whose sum is σ = 30658309056. Its totient is φ = 10183196092.

The previous prime is 20402632441. The next prime is 20402632447. The reversal of 20402632442 is 24423620402.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20402632441) 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, 9058658 + ... + 9060909.

It is an arithmetic number, because the mean of its divisors is an integer number (3832288632).

Almost surely, 2^20402632442 is an apocalyptic number.

20402632442 is a deficient number, since it is larger than the sum of its proper divisors (10255676614).

20402632442 is a wasteful number, since it uses less digits than its factorization.

20402632442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18120132.

The product of its (nonzero) digits is 18432, while the sum is 29.

The spelling of 20402632442 in words is "twenty billion, four hundred two million, six hundred thirty-two thousand, four hundred forty-two".