20211506452 has 48 divisors (see below), whose sum is σ = 36498070224. Its totient is φ = 9787392000.

The previous prime is 20211506417. The next prime is 20211506477. The reversal of 20211506452 is 25460511202.

It can be written as a sum of positive squares in 8 ways, for example, as 315275536 + 19896230916 = 17756^2 + 141054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20211506452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17113302 + ... + 17114482.

It is an arithmetic number, because the mean of its divisors is an integer number (760376463).

Almost surely, 2^20211506452 is an apocalyptic number.

It is an amenable number.

20211506452 is a deficient number, since it is larger than the sum of its proper divisors (16286563772).

20211506452 is a wasteful number, since it uses less digits than its factorization.

20211506452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1898 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 20211506452 in words is "twenty billion, two hundred eleven million, five hundred six thousand, four hundred fifty-two".