20401215201064 has 32 divisors (see below), whose sum is σ = 40026606192000. Its totient is φ = 9729924331072.

The previous prime is 20401215201007. The next prime is 20401215201071. The reversal of 20401215201064 is 46010251210402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154357579 + ... + 154489690.

It is an arithmetic number, because the mean of its divisors is an integer number (1250831443500).

Almost surely, 2^{20401215201064} is an apocalyptic number.

It is an amenable number.

20401215201064 is a deficient number, since it is larger than the sum of its proper divisors (19625390990936).

20401215201064 is a wasteful number, since it uses less digits than its factorization.

20401215201064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308847657 (or 308847653 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 20401215201064 its reverse (46010251210402), we get a palindrome (66411466411466).

The spelling of 20401215201064 in words is "twenty trillion, four hundred one billion, two hundred fifteen million, two hundred one thousand, sixty-four".