20315252437 has 2 divisors, whose sum is σ = 20315252438. Its totient is φ = 20315252436.

The previous prime is 20315252429. The next prime is 20315252471. The reversal of 20315252437 is 73425251302.

It is an a-pointer prime, because the next prime (20315252471) can be obtained adding 20315252437 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18570603076 + 1744649361 = 136274^2 + 41769^2 .

It is a cyclic number.

It is not a de Polignac number, because 20315252437 - 2³ = 20315252429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315253437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157626218 + 10157626219.

It is an arithmetic number, because the mean of its divisors is an integer number (10157626219).

Almost surely, 2^20315252437 is an apocalyptic number.

It is an amenable number.

20315252437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315252437 is an equidigital number, since it uses as much as digits as its factorization.

20315252437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 20315252437 in words is "twenty billion, three hundred fifteen million, two hundred fifty-two thousand, four hundred thirty-seven".