20401400445 has 8 divisors (see below), whose sum is σ = 32642240736. Its totient is φ = 10880746896.

The previous prime is 20401400441. The next prime is 20401400479. The reversal of 20401400445 is 54400410402.

It is a happy number.

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

It is not a de Polignac number, because 20401400445 - 2² = 20401400441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401400441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680046667 + ... + 680046696.

It is an arithmetic number, because the mean of its divisors is an integer number (4080280092).

Almost surely, 2^20401400445 is an apocalyptic number.

It is an amenable number.

20401400445 is a deficient number, since it is larger than the sum of its proper divisors (12240840291).

20401400445 is a wasteful number, since it uses less digits than its factorization.

20401400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360093371.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20401400445 its reverse (54400410402), we get a palindrome (74801810847).

The spelling of 20401400445 in words is "twenty billion, four hundred one million, four hundred thousand, four hundred forty-five".