2021502402 has 72 divisors (see below), whose sum is σ = 4712572800. Its totient is φ = 626041728.

The previous prime is 2021502401. The next prime is 2021502409. The reversal of 2021502402 is 2042051202.

It is a super-2 number, since 2×2021502402² = 8172943922583539208, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021502401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 408499 + ... + 413417.

It is an arithmetic number, because the mean of its divisors is an integer number (65452400).

Almost surely, 2^2021502402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021502402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356286400).

2021502402 is an abundant number, since it is smaller than the sum of its proper divisors (2691070398).

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

2021502402 is a wasteful number, since it uses less digits than its factorization.

2021502402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2021502402 is about 44961.1210047081. The cubic root of 2021502402 is about 1264.4201859896.

Adding to 2021502402 its reverse (2042051202), we get a palindrome (4063553604).

The spelling of 2021502402 in words is "two billion, twenty-one million, five hundred two thousand, four hundred two".