20737487 has 2 divisors, whose sum is σ = 20737488. Its totient is φ = 20737486.

The previous prime is 20737471. The next prime is 20737517. The reversal of 20737487 is 78473702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20737487 - 2⁴ = 20737471 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20737487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20737447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10368743 + 10368744.

It is an arithmetic number, because the mean of its divisors is an integer number (10368744).

Almost surely, 2^20737487 is an apocalyptic number.

20737487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20737487 is an equidigital number, since it uses as much as digits as its factorization.

20737487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 20737487 is about 4553.8431022599. The cubic root of 20737487 is about 274.7379851472.

The spelling of 20737487 in words is "twenty million, seven hundred thirty-seven thousand, four hundred eighty-seven".