20377970 has 16 divisors (see below), whose sum is σ = 37373400. Its totient is φ = 7997184.

The previous prime is 20377961. The next prime is 20377979. The reversal of 20377970 is 7977302.

It is an interprime number because it is at equal distance from previous prime (20377961) and next prime (20377979).

It can be written as a sum of positive squares in 4 ways, for example, as 12020089 + 8357881 = 3467^2 + 2891^2 .

It is a super-2 number, since 2×20377970² = 830523322641800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20377970.

It is not an unprimeable number, because it can be changed into a prime (20377979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18695 + ... + 19754.

Almost surely, 2^20377970 is an apocalyptic number.

20377970 is a deficient number, since it is larger than the sum of its proper divisors (16995430).

20377970 is a wasteful number, since it uses less digits than its factorization.

20377970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38509.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 20377970 is about 4514.1964955017. The cubic root of 20377970 is about 273.1410489132.

The spelling of 20377970 in words is "twenty million, three hundred seventy-seven thousand, nine hundred seventy".