20401531406315 has 16 divisors (see below), whose sum is σ = 24893211854016. Its totient is φ = 16048208265600.

The previous prime is 20401531406297. The next prime is 20401531406339. The reversal of 20401531406315 is 51360413510402.

It is not a de Polignac number, because 20401531406315 - 2⁶ = 20401531406251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76903916 + ... + 77168745.

It is an arithmetic number, because the mean of its divisors is an integer number (1555825740876).

Almost surely, 2^{20401531406315} is an apocalyptic number.

20401531406315 is a deficient number, since it is larger than the sum of its proper divisors (4491680447701).

20401531406315 is a wasteful number, since it uses less digits than its factorization.

20401531406315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154073110.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 20401531406315 its reverse (51360413510402), we get a palindrome (71761944916717).

The spelling of 20401531406315 in words is "twenty trillion, four hundred one billion, five hundred thirty-one million, four hundred six thousand, three hundred fifteen".