20015344651 has 2 divisors, whose sum is σ = 20015344652. Its totient is φ = 20015344650.

The previous prime is 20015344639. The next prime is 20015344663. The reversal of 20015344651 is 15644351002.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20015344639) and next prime (20015344663).

It is a cyclic number.

It is not a de Polignac number, because 20015344651 - 2¹⁷ = 20015213579 is a prime.

It is a super-2 number, since 2×20015344651² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20015344681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007672325 + 10007672326.

It is an arithmetic number, because the mean of its divisors is an integer number (10007672326).

Almost surely, 2^20015344651 is an apocalyptic number.

20015344651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015344651 is an equidigital number, since it uses as much as digits as its factorization.

20015344651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 20015344651 its reverse (15644351002), we get a palindrome (35659695653).

The spelling of 20015344651 in words is "twenty billion, fifteen million, three hundred forty-four thousand, six hundred fifty-one".