20101392 has 160 divisors (see below), whose sum is σ = 63488000. Its totient is φ = 6065280.

The previous prime is 20101387. The next prime is 20101399. The reversal of 20101392 is 29310102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20101399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254409 + ... + 254487.

It is an arithmetic number, because the mean of its divisors is an integer number (396800).

Almost surely, 2^20101392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31744000).

20101392 is an abundant number, since it is smaller than the sum of its proper divisors (43386608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101392 is a wasteful number, since it uses less digits than its factorization.

20101392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20101392 is about 4483.4575943127. The cubic root of 20101392 is about 271.8996890778.

Adding to 20101392 its reverse (29310102), we get a palindrome (49411494).

The spelling of 20101392 in words is "twenty million, one hundred one thousand, three hundred ninety-two".