20400213442 has 8 divisors (see below), whose sum is σ = 34971794496. Its totient is φ = 8742948612.

The previous prime is 20400213439. The next prime is 20400213487. The reversal of 20400213442 is 24431200402.

It is a happy number.

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, 728579038 + ... + 728579065.

It is an arithmetic number, because the mean of its divisors is an integer number (4371474312).

Almost surely, 2^20400213442 is an apocalyptic number.

20400213442 is a deficient number, since it is larger than the sum of its proper divisors (14571581054).

20400213442 is a wasteful number, since it uses less digits than its factorization.

20400213442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457158112.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20400213442 its reverse (24431200402), we get a palindrome (44831413844).

The spelling of 20400213442 in words is "twenty billion, four hundred million, two hundred thirteen thousand, four hundred forty-two".