10210009940 has 144 divisors (see below), whose sum is σ = 24781447152. Its totient is φ = 3519479808.

The previous prime is 10210009939. The next prime is 10210009967. The reversal of 10210009940 is 4990001201.

It can be written as a sum of positive squares in 24 ways, for example, as 4140665104 + 6069344836 = 64348^2 + 77906^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7871372 + ... + 7872668.

It is an arithmetic number, because the mean of its divisors is an integer number (172093383).

Almost surely, 2^10210009940 is an apocalyptic number.

10210009940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10210009940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12390723576).

10210009940 is an abundant number, since it is smaller than the sum of its proper divisors (14571437212).

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

10210009940 is a wasteful number, since it uses less digits than its factorization.

10210009940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 10210009940 in words is "ten billion, two hundred ten million, nine thousand, nine hundred forty".