20401011323 has 16 divisors (see below), whose sum is σ = 25494082560. Its totient is φ = 15859982400.

The previous prime is 20401011317. The next prime is 20401011329. The reversal of 20401011323 is 32311010402.

It is an interprime number because it is at equal distance from previous prime (20401011317) and next prime (20401011329).

It is a cyclic number.

It is not a de Polignac number, because 20401011323 - 2¹² = 20401007227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401011329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274178 + ... + 340551.

It is an arithmetic number, because the mean of its divisors is an integer number (1593380160).

Almost surely, 2^20401011323 is an apocalyptic number.

20401011323 is a deficient number, since it is larger than the sum of its proper divisors (5093071237).

20401011323 is a wasteful number, since it uses less digits than its factorization.

20401011323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615178.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20401011323 its reverse (32311010402), we get a palindrome (52712021725).

The spelling of 20401011323 in words is "twenty billion, four hundred one million, eleven thousand, three hundred twenty-three".