21067150057 has 6 divisors (see below), whose sum is σ = 22379291198. Its totient is φ = 19827905664.

The previous prime is 21067150051. The next prime is 21067150063. The reversal of 21067150057 is 75005176012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21067150051) and next prime (21067150063).

It can be written as a sum of positive squares in 3 ways, for example, as 13323854041 + 7743296016 = 115429^2 + 87996^2 .

It is not a de Polignac number, because 21067150057 - 2¹¹ = 21067148009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21067150051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36448068 + ... + 36448645.

Almost surely, 2^21067150057 is an apocalyptic number.

It is an amenable number.

21067150057 is a deficient number, since it is larger than the sum of its proper divisors (1312141141).

21067150057 is an equidigital number, since it uses as much as digits as its factorization.

21067150057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72896747 (or 72896730 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 21067150057 in words is "twenty-one billion, sixty-seven million, one hundred fifty thousand, fifty-seven".