20101400 has 48 divisors (see below), whose sum is σ = 50990040. Its totient is φ = 7308800.

The previous prime is 20101399. The next prime is 20101421. The reversal of 20101400 is 410102.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2369 + ... + 6768.

Almost surely, 2^20101400 is an apocalyptic number.

20101400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101400 is an abundant number, since it is smaller than the sum of its proper divisors (30888640).

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

20101400 is a wasteful number, since it uses less digits than its factorization.

20101400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9164 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20101400 is about 4483.4584864812. The cubic root of 20101400 is about 271.8997251482.

Adding to 20101400 its reverse (410102), we get a palindrome (20511502).

The spelling of 20101400 in words is "twenty million, one hundred one thousand, four hundred".