20152445252 has 24 divisors (see below), whose sum is σ = 37427588856. Its totient is φ = 9461587968.

The previous prime is 20152445227. The next prime is 20152445263. The reversal of 20152445252 is 25254425102.

It can be written as a sum of positive squares in 4 ways, for example, as 926958916 + 19225486336 = 30446^2 + 138656^2 .

It is a super-2 number, since 2×20152445252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312773 + ... + 371660.

It is an arithmetic number, because the mean of its divisors is an integer number (1559482869).

Almost surely, 2^20152445252 is an apocalyptic number.

It is an amenable number.

20152445252 is a deficient number, since it is larger than the sum of its proper divisors (17275143604).

20152445252 is a wasteful number, since it uses less digits than its factorization.

20152445252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684887 (or 684885 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 20152445252 in words is "twenty billion, one hundred fifty-two million, four hundred forty-five thousand, two hundred fifty-two".