20401421452 has 24 divisors (see below), whose sum is σ = 37865513952. Its totient is φ = 9597244800.

The previous prime is 20401421431. The next prime is 20401421519. The reversal of 20401421452 is 25412410402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812049 + ... + 1823272.

It is an arithmetic number, because the mean of its divisors is an integer number (1577729748).

Almost surely, 2^20401421452 is an apocalyptic number.

It is an amenable number.

20401421452 is a deficient number, since it is larger than the sum of its proper divisors (17464092500).

20401421452 is a wasteful number, since it uses less digits than its factorization.

20401421452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635409 (or 3635407 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20401421452 its reverse (25412410402), we get a palindrome (45813831854).

The spelling of 20401421452 in words is "twenty billion, four hundred one million, four hundred twenty-one thousand, four hundred fifty-two".