20400203010 has 128 divisors (see below), whose sum is σ = 54177133824. Its totient is φ = 4875100160.

The previous prime is 20400203003. The next prime is 20400203039. The reversal of 20400203010 is 1030200402.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7344742 + ... + 7347518.

It is an arithmetic number, because the mean of its divisors is an integer number (423258858).

Almost surely, 2^20400203010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20400203010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27088566912).

20400203010 is an abundant number, since it is smaller than the sum of its proper divisors (33776930814).

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

20400203010 is a wasteful number, since it uses less digits than its factorization.

20400203010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20400203010 its reverse (1030200402), we get a palindrome (21430403412).

The spelling of 20400203010 in words is "twenty billion, four hundred million, two hundred three thousand, ten".